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INTRODUCTION: Research quality within the neurosurgical field remains suboptimal. Therefore, many studies published in the neurosurgical literature lack enough statistical power to establish the presence or absence of clinically important differences between treatment arms. The field of neurotrauma deals with additional challenges, with fewer financial incentives and restricted resources in low-income and middle-income countries with the highest burden of neurotrauma diseases. In this systematic review, we aim to estimate the prevalence of false claims of equivalence in the neurosurgical trauma literature and identify its predictive factors. METHODS AND ANALYSIS: The Preferred Reporting Items for Systematic Review and Meta-Analyses recommendations were followed. Randomised clinical trials that enrolled only traumatic brain injury patients and investigated any type of intervention (surgical or non-surgical) will be eligible for inclusion. The MEDLINE/PubMed database will be searched for articles in English published from January 1960 to July 2020 in 15 top-ranked journals. A false claim of equivalence will be identified by insufficient power to detect a clinically meaningful effect: for categorical outcomes, a difference of at least 25% and 50%, and for continuous outcomes, a Cohen's d of at least 0.5 and 0.8. Using the number of patients in each treatment arm and the minimum effect sizes to be detected, the power of each study will be calculated with the assumption of a two-tailed alpha that equals 0.05. Standardised differences between the groups with and without a false claim of equivalence will be calculated, and the variables with a standardised difference equal or above 0.2 and 0.5 will be considered weakly and strongly associated with false claims of equivalence, respectively. The data analysis will be blinded to the authors and institutions of the studies. ETHICS AND DISSEMINATION: This study will not involve primary data collection. Therefore, formal ethical approval will not be required. The final systematic review will be published in a peer-reviewed journal and presented at appropriate conferences.
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Lesiones Traumáticas del Encéfalo , Revisiones Sistemáticas como Asunto , Humanos , Lesiones Traumáticas del Encéfalo/cirugía , Lesiones Traumáticas del Encéfalo/epidemiología , Procedimientos Neuroquirúrgicos , Proyectos de Investigación , Ensayos Clínicos Controlados Aleatorios como Asunto , PrevalenciaRESUMEN
BACKGROUND: Traditionally, patients undergoing craniotomy were subject to extended hospital stays for intensive monitoring and management of potential complications. However, with the evolution of surgical methods, anesthesia, and postoperative protocols, the feasibility and interest in same-day discharge (SDD) are growing. This study aimed to evaluate whether same-day discharge is a safe and feasible approach in craniotomy through a meta-analysis of the available literature. METHODS: Following PRISMA guidelines, a comprehensive search was conducted across Medline, Embase, Cochrane, and Web of Science databases from inception to December 2023. Eligible studies comprised reports in English with a minimum of 4 patients who underwent craniotomies and were discharged with same-day discharge, whether single-arm or comparative with normal discharge. Single proportion analysis with 95 % confidence interval (CI) was used to pool the studies and Odds Ratio (OR) with 95 % CI was used to measure effects in comparative analysis. A random-effects model was adopted. Endpoints included success and failure of pre-planned same-day discharge, and postoperative complications throughout the hospital stay (until discharge), these complications were further categorized into major and minor complications. Also, need for reoperation, readmission within 24 h, readmission after 24 h, and mortality. RESULTS: Seven observational studies were included. Five studies were included in the single-arm analysis, comprising data from 715 patients. Four studies comprising 731 patients were included in the comparative analysis, of whom 233 were discharged on SDD, and 498 were discharged normally. The analysis revealed a success rate of 88 % (95 % CI, 83 %-94 %), readmission to the hospital within the initial 24 h rate of 2 % (95 % CI, 1 %-2 %), readmission after 24 h rate of 1 % (95 % CI, 0 %-2 %;), total postoperative complications until discharge rate of 2 % (95 % CI, 1 %-4 %), major complications rate of 0 % (95 % CI, 0 %-0 %), minor complications rate of 2 % (95 % CI, 1 %-4 %), and mortality rate of 0 % (95 % CI, 0 %-0 %). Comparative analysis for complications and mortality showed no difference between both approaches. CONCLUSION: This systematic review and meta-analysis identified that same-day discharge in craniotomy for selected patients, as well as for tumor resection craniotomies, is highly feasible and safe, with a high success rate, low failure, and reoperation rates. Moreover, for selected patients, no evidence of harm in same-day discharge was identified when compared with normal discharge. Consequently, same-day discharge may be considered a viable option, provided appropriate selection criteria are employed.
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Craneotomía , Alta del Paciente , Humanos , Craneotomía/métodos , Craneotomía/efectos adversos , Alta del Paciente/estadística & datos numéricos , Complicaciones Posoperatorias/epidemiología , Tiempo de Internación/estadística & datos numéricosRESUMEN
OBJECTIVE: Spin is characterized as a misinterpretation of results that, whether deliberate or unintentional, culminates in misleading conclusions and steers readers toward an excessively optimistic perspective of the data. The primary objective of this systematic review was to estimate the prevalence and nature of spin within the traumatic brain injury (TBI) literature. Additionally, the identification of associated factors is intended to provide guidance for future research practices. METHODS: The Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) recommendations were followed. A search of the MEDLINE/PubMed database was conducted to identify English-language articles published between January 1960 and July 2020. Inclusion criteria encompassed randomized controlled trials (RCTs) that exclusively enrolled TBI patients, investigating various interventions, whether surgical or nonsurgical, and that were published in high-impact journals. Spin was defined as 1) a focus on statistically significant results not based on the primary outcome; 2) interpreting statistically nonsignificant results for a superiority analysis of the primary outcome; 3) claiming or emphasizing the beneficial effect of the treatment despite statistically nonsignificant results; 4) conclusion focused in the per-protocol or as-treated analysis instead of the intention-to-treat (ITT) results; 5) incorrect statistical analysis; or 6) republication of a significant secondary analysis without proper acknowledgment of the primary outcome analysis result. Primary outcomes were those explicitly reported as such in the published article. Studies without a clear primary outcome were excluded. The study characteristics were described using traditional descriptive statistics and an exploratory inferential analysis was performed to identify those associated with spin. The studies' risk of bias was evaluated by the Cochrane Risk of Bias Tool. RESULTS: A total of 150 RCTs were included and 22% (n = 33) had spin, most commonly spin types 1 and 3. The overall risk of bias (p < 0.001), a neurosurgery department member as the first author (p = 0.009), absence of a statistician among authors (p = 0.042), and smaller sample sizes (p = 0.033) were associated with spin. CONCLUSIONS: The prevalence of spin in the TBI literature is high, even at leading medical journals. Studies with higher risks of bias are more frequently associated with spin. Critical interpretation of results and authors' conclusions is advisable regardless of the study design and published journal.
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RESUMO Objetivo Caracterizar os atos comunicativos de crianças com transtorno do desenvolvimento da linguagem, verificando a quantidade de atos comunicativos, atos comunicativos interativos e sua relação com a idade cronológica. Métodos Foram participantes 40 crianças de ambos os gêneros com diagnóstico de transtorno do desenvolvimento da linguagem com idades entre 3 anos e 2 meses e 7 anos e 11 meses. Todos os sujeitos foram avaliados com a Prova de Pragmática ABFW - Teste de Linguagem Infantil, em sua avaliação inicial. Especificamente para este estudo, focou-se na verificação da quantidade de atos comunicativos, atos comunicativos por minuto, atos comunicativos interativos e número de iniciativas comunicativas. Resultados Os dados indicaram que crianças com transtorno do desenvolvimento da linguagem apresentam alterações importantes em relação aos atos comunicativos e interações comunicativas e há correlação dessas variáveis com a idade cronológica. Conclusão Crianças com transtorno do desenvolvimento da linguagem apresentam diminuição no número de atos comunicativos, atos comunicativos interativos e interações comunicativas, quando comparadas aos valores de referência de crianças típicas, independentemente da idade.
ABSTRACT Purpose To characterize the communicative acts of children with Developmental Language Disorder, verifying the number of communicative acts, interactive communicative acts, and their relationship with chronological age. Methods Forty children of both sexes with a diagnosis of Developmental Language Disorder aged between 3 years and seven years and 11 months were subjects. All subjects were assessed with the ABFW Pragmatics Test - Child Language Test in their initial assessment. Specifically, this study focused on verifying the number of communicative acts, communicative acts per minute, interactive communicative acts, and the number of communicative initiatives. Results The data indicate that children with Developmental Language Disorder present significant alterations concerning communicative acts and communicative interactions, and there is a correlation between these variables and chronological age. Conclusion Children with Developmental Language Disorder show a decrease in the number of communicative acts, interactive communicative acts, and communicative interactions when compared to the reference values of typical children, regardless of age.
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Humanos , Masculino , Femenino , Preescolar , Niño , Trastorno Autístico , Trastorno de Comunicación Social , Trastorno Específico del Lenguaje , Trastornos del Desarrollo del Lenguaje , Pruebas del Lenguaje , Lenguaje Infantil , Fonoaudiología , Trastornos del NeurodesarrolloRESUMEN
BACKGROUND: Glioblastoma is a severe brain tumor that requires aggressive treatment involving surgery, radiotherapy, and chemotherapy, offering a survival rate of only 15 months. Fortunately, recent nanotechnology progress has enabled novel approaches and, alongside ferrocenes' unique properties of cytotoxicity, sensitization, and interaction with reactive oxygen species, have brought new possibilities to complement chemotherapy in nanocarrier systems, enhancing treatment results. METHODS: In this work, we developed and characterized a temozolomide-loaded nanoemulsion and evaluated its cytotoxic potential in combination with ferrocene in the temozolomide-resistant T98G and temozolomide-sensitive U87 cell lines. The effects of the treatments were assessed through acute assays of cell viability, cell death, mitochondrial alterations, and a treatment protocol simulation based on different two-cycle regimens. RESULTS: Temozolomide nanoemulsion showed a z-average diameter of 173.37 ± 0.86 nm and a zeta potential of - 6.53 ± 1.13 mV. Physicochemical characterization revealed that temozolomide is probably associated with nanoemulsion droplets instead of being entrapped within the nanostructure, allowing a rapid drug release. In combination with ferrocene, temozolomide nanoemulsion reduced glioblastoma cell viability in both acute and two-cycle regimen assays. The combined treatment approach also reversed T98G's temozolomide-resistant profile by altering the mitochondrial membrane potential of the cells, thus increasing reactive oxygen species generation, and ultimately inducing cell death. CONCLUSIONS: Altogether, our results indicate that using nanoemulsion containing temozolomide in combination with ferrocene is an effective approach to improve glioblastoma therapy outcomes.
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Neoplasias Encefálicas , Glioblastoma , Humanos , Temozolomida/farmacología , Temozolomida/uso terapéutico , Glioblastoma/patología , Metalocenos/uso terapéutico , Especies Reactivas de Oxígeno/metabolismo , Línea Celular Tumoral , Neoplasias Encefálicas/tratamiento farmacológico , Neoplasias Encefálicas/patologíaRESUMEN
Different drug delivery systems are prepared on the nanoscale to improve performance in drug formulations, such as nanoparticles or nanoemulsions. Polymeric nanoparticles have been used to encapsulate drugs for several applications because of some characteristics of these carriers to control drug delivery, transport molecules to a specific tissue, protect the drugs, and increase drug bioavailability. When using nanocapsules, an essential parameter for encapsulating different hydrophilic or lipophilic molecules is the characteristics of the core. Babassu oil (BBS) is a natural product from Brazil, composed majoritary of short-chain saturated fatty acids. BBS has an elevated hydrophilic-lipophilic balance (HLB), which may promote interaction of the oil with hydrophilic drugs. In this study, we developed and characterized particles containing babassu oil, solely or combined with sorbitan monostearate (Span® 60) or medium chain triglycerides (MCT) in the core to test different HLB and evaluated the encapsulation of a model hydrophilic molecule. Different techniques were used to characterize all formulations in terms of size and distribution, and in vitro drug release by dialysis technique was performed. The BBS was also characterized and presented 46,05 ± 1,11% and 15,38 ± 0,06% of lauric and myristic acid, respectively; saponification index of 248.87 ± 0.64 mg of KOH per gram of BBS, and no oxidation of the oil was indicated by means of peroxide index. Evaporation of solvent carried in the room or reduced pressure influenced the particles' size; nevertheless, all had a z-average smaller than 220 nm. Nanoparticles with a ratio among aqueous phase and organic phase of 2.8 were considered adequate to encapsulate diclofenac sodium. The particles size/zeta potential were 189.83 ± 7.86 nm / - 10.39 ± 2.52 mV, 156.80 ± 4.77 nm / - 9.27 ± 4.61 mV, and 168.87 ± 5.22 nm / - 12.98 ± 4.66 mV to nanoparticles prepared with BBS + MCT, BBS, and BBS + Span® 60, respectively. All formulations exhibited an amount of drug content close to the theoretical amount (1.0 mg mL-1), and no difference was observed in the release profile among the three nanoparticles. Formulation containing only babassu oil in the core displayed 66.78 ± 15.62% of encapsulation efficiency to diclofenac sodium, the highest value among all formulations tested. Results demonstrate that the innovative nanoparticles containing BBS promote the encapsulation of a model hydrophilic molecule, and other components can be evaluated to change the core's hydrophilicity and encapsulation of molecules.
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Diclofenaco , Nanopartículas , Preparaciones de Acción Retardada , Sistemas de Liberación de Medicamentos , Aceites de Plantas , Polímeros , Triglicéridos , Interacciones Hidrofóbicas e Hidrofílicas , Portadores de Fármacos , Tamaño de la PartículaRESUMEN
Preliminary methodologically limited studies suggested that taste and smell known as chemosensory impairments and neuropsychiatric symptoms are associated in post-COVID-19. The objective of this study is to evaluate whether chemosensory dysfunction and neuropsychiatric impairments in a well-characterized post-COVID-19 sample. This is a cohort study assessing adult patients hospitalized due to moderate or severe forms of COVID-19 between March and August 2020. Baseline information includes several clinical and hospitalization data. Further evaluations were made using several different reliable instruments designed to assess taste and smell functions, parosmia, and neuropsychiatric disorders (using standardized psychiatric and cognitive measures). Out of 1800 eligible individuals, 701 volunteers were assessed on this study. After multivariate analysis, patients reporting parosmia had a worse perception of memory performance (p < 0.001). Moderate/severe hypogeusia was significantly associated with a worse performance on the word list memory task (p = 0.012); Concomitant moderate/severe olfactory and gustatory loss during the acute phase of COVID-19 was also significantly associated with episodic memory impairment (p = 0.006). We found a positive association between reported chemosensory (taste and olfaction) abnormalities and cognition dysfunction in post-COVID-19 patients. These findings may help us identify potential mechanisms linking these two neurobiological functions, and also support the speculation on a possible route through which SARS-CoV-2 may reach the central nervous system.
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COVID-19 , Trastornos del Olfato , Adulto , Humanos , COVID-19/complicaciones , SARS-CoV-2 , Trastornos del Gusto/epidemiología , Trastornos del Gusto/etiología , Trastornos del Gusto/diagnóstico , Síndrome Post Agudo de COVID-19 , Estudios de Cohortes , Trastornos del Olfato/epidemiología , Trastornos del Olfato/etiología , Olfato , MorbilidadRESUMEN
Neste artigo, discutimos os usos da categoria "assédio" empregada por jovens estudantes de escolas públicas de Ensino Médio para dar sentido a experiências de violência e discriminação de gênero ocorridas dentro e fora da escola. A análise baseia-se em registros de trabalho de campo produzidos no âmbito de uma pesquisa multicêntrica e de métodos mistos, realizada em nove escolas de São Paulo (SP/BR). O assédio aparece como uma categoria polissêmica que, ao nomear a violência, ajuda no enfrentamento das hierarquias e desigualdades de gênero e geração. Depreendemos que as jovens têm questionado normativas e atitudes que alimentam as desigualdades de gênero nas escolas, além de denunciarem o silenciamento ou inadequação da instituição no enfrentamento do problema, o que possibilita identificar convergências com uma nova sensibilidade em torno da violência contra mulheres que os discursos feministas globalizados fizeram emergir.(AU)
Resumen En este artículo discutimos los usos de la categoría "acoso" empleada por jóvenes estudiantes de escuelas públicas de enseñanza media para dar sentido a la experiencia de violencia y discriminación de género ocurridas dentro y fuera de la escuela. El análisis se basa en registros de trabajo en campo producidos en el ámbito de una investigación multicéntrica y de métodos mixtos, realizada en nueve escuelas de São Paulo (SP/BR). El acoso parece como una categoría polisémica que, al nombrar la violencia, ayuda en el enfrentamiento de las jerarquías y desigualdades de género y generación. Concluimos que las jóvenes han puesto en tela de juicio normativas y actitudes que alimentan las desigualdades de género de las escuelas, además de denunciar el silenciamiento o la inadecuación de la institución en el enfrentamiento del problema, lo que posibilita la identificación de convergencias con una nueva sensibilidad alrededor de la violencia contra mujeres que los discursos feministas globalizados hicieron surgir.(AU)
Abstract In this article, we discuss uses of "harassment" as a category employed by young students from public high schools to make sense of violence and gender discrimination experiences that occur in and out of school. The analysis is based on fieldwork records produced within the scope of a multicenter, mixed-methods research carried out in nine schools located in São Paulo. Harassment appears as a polysemic category that, by naming violence, helps to face gender and generation hierarchies and inequalities. We infer that the young girls have questioned norms and attitudes that feed gender inequalities in schools; in addition, they have denounced the silence or inadequacy of the institution in facing the problem. This enables to identify convergences with a new sensibility regarding violence against women that globalized feminist discourses have brought to the surface.(AU)
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Resumo Esse artigo é fruto de pesquisa desenvolvida em uma escola pública de ensino médio e discute como os marcadores de gênero e orientação sexual atravessam as experiências de paquera nessa instituição. Foram analisados materiais produzidos a partir de entrevistas, rodas de conversa e observações de inspiração etnográfica. A temática surge a partir do trabalho de campo quando os/as jovens apontam as relações de paquera como prática e assunto recorrente entre os/as estudantes. Sendo a escola um importante espaço de socialização juvenil, identificamos que para relações de paquera heterossexuais parece haver um roteiro que reitera as expectativas e normas de gênero. Já entre pessoas do mesmo gênero, a paquera é marcada por distintos agenciamentos para que possam vivenciar suas relações afetivo-sexuais, além de terem que lidar com experiências de discriminação.
Abstract This article is the result of research developed in a public high school and discusses how the markers of gender and sexual orientation cross the experiences of flirting in this institution. It analyzes materials from interviews, conversation circles and observations inspired on ethnographic methods. The theme arises from fieldwork when young people point to flirting relationships as a practice and a recurring issue among students. As the school is an important space for youth socialization, we identified that for heterosexual flirting relationships there seems to be a script that reiterates gender expectations and norms. In contrast, among people of the same gender, flirting is marked by different assemblages so they can experience affective-sexual relationships, in addition they have to deal with experiences of discrimination.
Resumen Este artículo es fruto de investigación desenvuelta en una escuela secundaria pública y discute cómo los marcadores de género y de orientación sexual atraviesan las experiencias de coqueteo en esta institución. Han sido analizados materiales producidos a partir de entrevistas, ruedas de conversación y observaciones de inspiración etnográfica. La temática surge a partir del trabajo de campo cuando los jóvenes apuntan las relaciones de coqueteo como práctica y tema recurrente entre los estudiantes. Siendo la escuela un importante espacio de socialización juvenil, identificamos que para relaciones de coqueteo heterosexuales parece haber un rotero que reitera las expectativas y las normas de género. Ya entre personas del mismo género, el coqueteo es marcado por distintas mediaciones para que puedan vivir sus relaciones afectivo-sexuales, además de necesitaren lidiar con experiencias de discriminación.
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Pest management is challenged with resistant herbivores and problems regarding human health and environmental issues. Indeed, the greatest challenge to modern agriculture is to protect crops from pests and still maintain environmental quality. This study aimed to analyze by in silico, in vitro, and in vivo approaches to the feasibility of using the inhibitory protein extracted from mammals - Bovine Pancreatic Trypsin Inhibitor (BPTI) as a potential inhibitor of digestive trypsins from the pest Anticarsia gemmatalis and comparing the results with the host-plant inhibitor - Soybean Kunitz Trypsin Inhibitor (SKTI). BPTI and SKTI interacts with A. gemmatalis trypsin-like enzyme competitively, through hydrogen and hydrophobic bonds. A. gemmatalis larvae exposed to BPTI did not show two common adaptative mechanisms i.e., proteolytic degradation and overproduction of proteases, presenting highly reduced trypsin-like activity. On the other hand, SKTI-fed larvae did not show reduced trypsin-like activity, presenting overproduction of proteases and SKTI digestion. In addition, the larval survival was reduced by BPTI similarly to SKTI, and additionally caused a decrease in pupal weight. The non-plant protease inhibitor BPTI presents intriguing element to compose biopesticide formulations to help decrease the use of conventional refractory pesticides into integrated pest management programs.
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Agentes de Control Biológico , Glycine max , Mariposas Nocturnas , Plaguicidas , Animales , Aprotinina/farmacología , Agentes de Control Biológico/farmacología , Bovinos , Hidrógeno/farmacología , Larva , Péptido Hidrolasas/metabolismo , Plaguicidas/farmacología , Inhibidores de Proteasas/farmacología , Tripsina , Inhibidores de Tripsina/farmacologíaRESUMEN
INTRODUCTION: Spin is defined as an inaccurate interpretation of results, intentionally or not, leading to equivocal conclusions and misdirecting readers to look at the data in an overly optimistic way. Previous studies have shown a high prevalence of spin in scientific papers and this systematic review aims to investigate the nature and prevalence of spin in the neurosurgical trauma literature. Any associated factors will be identified to guide future research practice recommendations. METHODS AND ANALYSIS: The Preferred Reporting Item for Systematic Reviews and Meta-Analyses recommendations will be followed. Randomised clinical trials (RCTs) that enrolled only patients with traumatic brain injury and investigated any type of intervention (surgical or non-surgical) will be eligible for inclusion. The MEDLINE/PubMed database will be searched for articles in English published in 15 top-ranked journals. Spin will be defined as (1) a focus on statistically significant results not based on the primary outcome; (2) interpreting statistically non-significant results for a superiority analysis of the primary outcome; (3) claiming or emphasising the beneficial effect of the treatment despite statistically non-significant results; (4) conclusion focused in the per-protocol or as-treated analysis instead of the intention-to-treat results; (5) incorrect statistical analysis; (6) republication of a significant secondary analysis without proper acknowledgement of the primary outcome analysis result. Traditional descriptive statistics will be used to present RCT characteristics. Standardised differences between the groups with or without spin will be calculated. The variables with a standardised difference equal or above 0.2 and 0.5 will be considered weakly and strongly associated with spin, respectively. ETHICS AND DISSEMINATION: This study will not involve primary data collection and patients will not be involved. TRIAL REGISTRATION NUMBER: 10.17605/OSF.IO/H3FGY.
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Proyectos de Investigación , Bases de Datos Factuales , Humanos , Prevalencia , Revisiones Sistemáticas como AsuntoRESUMEN
Fourteen asymptomatic normocephalic newborns with confirmed congenital Zika infection were investigated. All newborns presented Zika virus (ZIKV) positivity on reverse transcriptase polymerase chain reaction. Following ZIKV-specific NS5 gene fragment sequencing in one child, phylogenetic analysis revealed that this isolate belonged to the Asian genotype, and clustered closely with other sequences previously isolated in north-east and northern regions of Brazil.
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Craneosinostosis , Complicaciones Infecciosas del Embarazo , Infección por el Virus Zika , Virus Zika , Brasil , Femenino , Humanos , Recién Nacido , Filogenia , Embarazo , Virus Zika/genética , Infección por el Virus Zika/diagnóstico , Infección por el Virus Zika/epidemiologíaRESUMEN
Studies of the superior longitudinal fasciculus (SLF) have multiplied in recent decades owing to methodological advances, but the absence of a convention for nomenclature remains a source of confusion. Here, we have reviewed existing nomenclatures in the context of the research studies that generated them and we have identified their agreements and disagreements. A literature search was conducted using PubMed/MEDLINE, Web-of-Science, Embase, and a review of seminal publications, without restrictions regarding publication date. Our search revealed that diffusion imaging, autoradiography, and fiber dissection have been the main methods contributing to tract designation. The first two have been particularly influential in systematizing the horizontal elements distant from the lateral sulcus. Twelve approaches to naming were identified, eight of them differing considerably from each other. The terms SLF and arcuate fasciculus (AF) were often used as synonyms until the second half of the 20th century. During the last 15 years, this has ceased to be the case in a growing number of publications. The term AF has been used to refer to the assembly of three different segments, or exclusively to long frontotemporal fibers. Similarly, the term SLF has been employed to denote the whole superior longitudinal associative system, or only the horizontal frontoparietal parts. As only partial correspondence can be identified among the available nomenclatures, and in the absence of an official designation of all anatomical structures that can be encountered in clinical practice, a high level of vigilance regarding the effectiveness of every oral or written act of communication is mandatory.
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Corteza Cerebral/anatomía & histología , Vías Nerviosas/anatomía & histología , Sustancia Blanca/anatomía & histología , Humanos , Terminología como AsuntoRESUMEN
ABSTRACT: Conrado de Freitas, M, Rossi, FE, Colognesi, LA, de Oliveira, JVNS, Zanchi, NE, Lira, FS, Cholewa, JM, and Gobbo, LA. Postactivation potentiation improves acute resistance exercise performance and muscular force in trained men. J Strength Cond Res 35(5): 1357-1363, 2021-The purpose of this study was to investigate the effects of heavy back squat (90% one repetition maximum [1RM]) postactivation potentiation (PAP) on acute resistance exercise performance and force production in recreationally trained men, and to verify the relationship between maximal strength and the PAP response. Ten resistance-trained men randomly completed 4 experimental trials: (a) back squats without PAP (No-PAP), (b) back squats with PAP, (c) maximum voluntary isometric contraction (MVIC) of the quadriceps without PAP, and (d) MVIC with PAP. Back squats were performed with 4 sets at 70% of 1 RM with 2 minutes of rest interval. The number of squats repetitions performed was recorded for each set, and a total number of repetitions were calculated to analyze performance. Maximum voluntary isometric contraction was measured using electronic dynamometer, and the peak force and mean force were recorded. Blood lactate concentration was analyzed presquat and postsquat exercise. Repetitions performed in the first set was significantly (p < 0.001) greater in the PAP condition (22.00 ± 5.14) compared with No-PAP (15.50 ± 5.10), which resulted in significantly (p = 0.001) more total repetitions performed in the PAP (56.20 ± 17.3) condition compared with No-PAP (48.80 ± 14.5). Maximum voluntary isometric contraction peak was higher in PAP than in No-PAP (PAP = 765.7 ± 147.8 vs. No-PAP = 696.8 ± 131.5 N, p = 0.006). No significant correlations were observed between back squat 1RM relative to body mass and the PAP response in squat and MVIC. There were no significant differences in lactate concentration between conditions. In conclusion, PAP resulting from a heavy load prior back squat exercise improved total volume during resistance exercise. In addition, PAP was effective to increase force production during MVIC, but there was no relationship between relative 1RM values and the PAP response in trained men.
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Entrenamiento de Fuerza , Ejercicio Físico , Humanos , Contracción Isométrica , Masculino , Fuerza Muscular , Músculo Esquelético , Músculo CuádricepsRESUMEN
ABSTRACT: Conrado de Freitas, M, Ricci-Vitor, AL, de Oliveira, JVNS, Quizzini, GH, Vanderlei, LCM, Silva, BSA, Zanchi, NE, Cholewa, JM, Lira, FS, and Rossi, FE. Appetite is suppressed after full-body resistance exercise compared with split-body resistance exercise: the potential influence of lactate and autonomic modulation. J Strength Cond Res 35(9): 2532-2540, 2021-The purposes of this study were to investigate the effects of full- vs. split-body resistance training on appetite and leptin response and to verify the potential involvement of lactate and autonomic modulation during this response in trained men. Twelve recreationally resistance-trained men (age = 26.1 ± 5.5 years) performed 3 randomized trials in 3 conditions: upper body (UB), lower body (LB), and full body (FB). The subjective rating of hunger was obtained through a visual analog scale. Leptin and lactate concentration were evaluated at rest, immediately after exercise, and during recovery. Heart rate variability in the time and frequency domains was recorded at baseline and during recovery (until 60 minutes after exercise) to assess autonomic modulation. The FB condition induced lower subjective hunger ratings than the UB at Post-1 hour (p < 0.05) and a significant difference in the area under the curve between conditions (p = 0.028) with lower hunger sensation for FB in relation to UB (p = 0.041). The FB presented greater lactate concentration and induced slower heart rate variability recovery in relation to UB and LB conditions (p < 0.05), and heart rate variability remained lower until 60 minutes after exercise compared with rest only in the FB condition. There was a significant negative correlation between subjective hunger ratings and lactate concentration only for the FB condition (r = -0.72, p = 0.028). Full-body resistance exercise induced lower subjective hunger ratings after exercise in relation to UB resistance exercise. The FB also induced higher lactate production and slower recovery of autonomic modulation compared with the UB and LB conditions. Future research is necessary to investigate a mechanistic relationship between lactate concentrations and hunger suppression after resistance exercise.
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Entrenamiento de Fuerza , Adulto , Apetito , Sistema Nervioso Autónomo , Ejercicio Físico , Humanos , Ácido Láctico , Masculino , Adulto JovenRESUMEN
BACKGROUND: Salvador was one of the Brazilian cities most affected during the 2015 Zika virus (ZIKV) outbreak. METHODS: A cross-sectional study was performed with enrolment of parturients and their newborns. RESULTS: Positive IgM antibodies for ZIKV, dengue (DENV) and Chikungunya (CHIKV) were present in 6.9, 11.9 and 22.8% of the parturients, and IgG antibodies were detected in 72.3, 92.3 and 38.6%, respectively. No cases of DENV congenital infection were identified. ZIKV and CHIKV congenital infections were observed in 16.5 and 13% of newborns, respectively. CONCLUSIONS: High exposure rates to the three arboviruses and the identification of newborns with ZIKV and CHIKV congenital infections reinforces the necessity of ZIKV and CHIKV prenatal and neonatal screening in endemic regions.
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Fiebre Chikungunya , Dengue , Infección por el Virus Zika , Anticuerpos Antivirales/sangre , Brasil/epidemiología , Fiebre Chikungunya/congénito , Fiebre Chikungunya/epidemiología , Estudios Transversales , Dengue/congénito , Dengue/epidemiología , Femenino , Humanos , Inmunoglobulina G/sangre , Recién Nacido , Embarazo , Infección por el Virus Zika/congénito , Infección por el Virus Zika/epidemiologíaRESUMEN
The objective of this study was to evaluate the chemical composition, and the trypanocidal and antibacterial activities of the essential oils from four species of Annonaceae: Bocageopsis multiflora (Mart.) R.E.Fr., Duguetia quitarensis Benth., Fusaea longifolia (Aubl.) Saff., and Guatteria punctata (Aubl.) R.A.Howard. The chemical composition of the essential oils from the aerial parts yielded 23, 20, 21 and 23 constituents, respectively, which were identified by GC/MS. The trypanocidal activity was evaluated against the amastigote and trypomastigote forms of T. cruzi. The antibacterial activity was evaluated by the microdilution method against enterohemorrhagic Escherichia coli, Pseudomonas aeruginosa, Streptococcus mutans, Streptococcus pyogenes, and methicillin-resistant Staphylococcus aureus. The results of trypanocidal activity showed that the essential oils of the four species were active at the tested concentrations, with G. punctata essential oil being the most active, with IC50 =0.029â µg/mL, and selectivity index (SI)=32, being 34 times more active than the reference drug benznidazole. All EOs showed strong antibacterial activity (minimum inhibitory concentrations of 4.68-37.5â µg/mL) against strains of S. mutans.
Asunto(s)
Annonaceae/química , Antibacterianos/farmacología , Aceites Volátiles/farmacología , Tripanocidas/farmacología , Antibacterianos/química , Antibacterianos/aislamiento & purificación , Escherichia coli/efectos de los fármacos , Staphylococcus aureus Resistente a Meticilina/efectos de los fármacos , Pruebas de Sensibilidad Microbiana , Aceites Volátiles/química , Aceites Volátiles/aislamiento & purificación , Pruebas de Sensibilidad Parasitaria , Pseudomonas aeruginosa/efectos de los fármacos , Especificidad de la Especie , Streptococcus mutans/efectos de los fármacos , Streptococcus pyogenes/efectos de los fármacos , Tripanocidas/química , Tripanocidas/aislamiento & purificación , Trypanosoma cruzi/efectos de los fármacosRESUMEN
Neurodevelopment in 29 normocephalic children with in utero exposure to Zika virus (ZIKV) was evaluated by the Bayley Scales of Infant and Toddler Development-Third Edition. Ten (35%) infants presented neurodevelopment delay. Language, cognitive and motor delays were identified in 9 (31%), 4 (14%) and 1 (3%) infants, respectively. Children exposed to ZIKV in utero must undergo careful evaluations for the early detection of any neurodevelopment delays in order to implement prompt intervention.
RESUMEN
(1) Background: We investigated the effects of 28 days of beta-alanine (ß-alanine) supplementation on the acute interference effect of high-intensity intermittent exercise (HIIE) on lower-body resistance exercise performance, body composition, and strength when combined with a resistance training program. (2) Methods: Twenty-two males were randomized into: ß-alanine supplementation (6.4 g/day) or placebo (6.4 g/day maltodextrin) during 28 days. Total body water, intracellular and extracellular water, fat-free mass (FFM), and fat mass were assessed using bioelectrical impedance. Participants performed 5000-m HIIE (1:1 effort and rest ratio) followed by resistance exercise (four sets of 80% at 45° leg press until muscular failure) at baseline and after 28 days. The resistance training program consisted of three sets of 10 to 12 RM with 90 s of rest, four days per week. (3) Results: For the post-HIIE leg press volume, higher values were observed post-training than pre-training, but no group x time interaction was observed. There was a non-significant trend for an interaction in the FFM change (ß-alanine = 2.8% versus placebo = 1.0%, p = 0.072). (4) Conclusion: Twenty-eight days of ß-alanine supplementation did not prevent acute strength loss during resistance exercise after high-intensity interval exercise, nor increase strength or hypertrophic adaptations associated with resistance training.
RESUMEN
To investigate the effects of full versus split body resistance exercise on postexercise hypotension and autonomic modulation in trained men. Sixteen resistance recreationally trained males (age, 24.9±5.3 years) performed three randomized trials: upper body (UB), lower body (LB), and full body (FB) conditions. Blood pressure and heart rate variability were collected at rest, immediately postexercise, post-10, and post-30 min during recovery. For systolic blood pressure, delta (30 min minus rest) was lower for the FB condition compared to the UB (-10.1±7.4 mmHg [FB] vs. -3.3±12.6 mmHg [LB] vs. -1.9±8.1 mmHg [UB], P=0.004). For diastolic blood pressure (-8.2±10.9 mmHg [FB] vs. -1.5±9.8 mmHg [LB] vs. -8.7±11.4 mmHg [UB], P=0.038) and mean blood pressure delta during recovery (-11.7±14 mmHg [FB] vs. -2.2±10.6 mmHg [LB] vs. -5.2±6.8 mmHg [UB], P=0.045), there were statistically significant lower values in the FB condition in relation to the LB condition. Regarding heart rate variability, there were no significant differences between conditions, however, the square root of the mean squared difference between adjacent RR intervals presented an increase until post-30 during recovery (P<0.001), and there was a higher values of low frequency and lower values of high frequency across time (P<0.001). Postexercise hypotension was influenced by the amount of muscle mass involved in a bout of resistance exercise, with the FB condition inducing lower systolic blood pressure in relation to the UB after exercise, as well as a great decrease in postexercise diastolic and mean blood pressure compared with the LB. The autonomic modulation response was similar between conditions during recovery.