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1.
Sci Rep ; 14(1): 8344, 2024 04 09.
Artículo en Inglés | MEDLINE | ID: mdl-38594328

RESUMEN

Social decisions are influenced by a person's social preferences. High psychopathy is defined by antisocial behaviour, but the relationship between psychopathy and social preferences remains unclear. In this study, we used a battery of economic games to study social decision-making and social preferences in relation to psychopathy in a sample of 35 male prison inmates, who were arrested for sexual and severe violent offenses (mean age = 39 years). We found no evidence for a relationship between social preferences (measured with the Dictator and Ultimatum Games, Social Value Orientation, and one-shot 2 × 2 games) and psychopathy (measured by the overall Hare Psychopathy Checklist-Revised score and both factors). These results are surprising but also difficult to interpret due to the small sample size. Our results contribute to the ongoing debate about psychopathy and social decision-making by providing crucial data that can be combined with future datasets to reach large sample sizes that can provide a more nuanced understanding about the relationship between psychopathy and social preferences.


Asunto(s)
Trastorno de Personalidad Antisocial , Prisioneros , Humanos , Masculino , Adulto , Trastorno de Personalidad Antisocial/diagnóstico , Proyectos Piloto , Agresión , Trastorno de la Conducta Social
2.
Environ Mol Mutagen ; 2024 Apr 21.
Artículo en Inglés | MEDLINE | ID: mdl-38644659

RESUMEN

Cataracts are one of the leading causes of blindness, with an estimated 95 million people affected worldwide. A hallmark of cataract development is lens opacification, typically associated not only with aging but also radiation exposure as encountered by interventional radiologists and astronauts during the long-term space mission. To better understand radiation-induced cataracts, the adverse outcome pathway (AOP) framework was used to structure and evaluate knowledge across biological levels of organization (e.g., macromolecular, cell, tissue, organ, organism and population). AOPs identify a sequence of key events (KEs) causally connected by key event relationships (KERs) beginning with a molecular initiating event to an adverse outcome (AO) of relevance to regulatory decision-making. To construct the cataract AO and retrieve evidence to support it, a scoping review methodology was used to filter, screen, and review studies based on the modified Bradford Hill criteria. Eight KEs were identified that were moderately supported by empirical evidence (e.g., dose-, time-, incidence-concordance) across the adjacent (directly linked) relationships using well-established endpoints. Over half of the evidence to justify the KER linkages was derived from the evidence stream of biological plausibility. Early KEs of oxidative stress and protein modifications had strong linkages to downstream KEs and could be the focus of countermeasure development. Several identified knowledge gaps and inconsistencies related to the quantitative understanding of KERs which could be the basis of future research, most notably directed to experiments in the range of low or moderate doses and dose-rates, relevant to radiation workers and other occupational exposures.

3.
Pediatr Cardiol ; 45(5): 1129-1131, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38522051

RESUMEN

The study aimed to evaluate the feasibility of using QR code-enabled medical bracelets for congenital heart disease (CHD) patients after hospital discharge to ensure quick communication of vital information to other medical personnel in emergency situations. A prospective study was conducted where QR code-enabled medical bracelets were given to families of postoperative pediatric cardiac patients. The QR code linked to a secure medical information sheet detailing the patient's cardiac history. Post-study surveys were completed by providers and families to assess their experiences with the bracelet. Of the 20 participants enrolled, 65% used the QR bracelet when seeking medical care. 55% found the bracelet useful, and 70% rated their experience as either "positive" or "very positive". Additionally, 80% recommended the bracelet for other patients undergoing cardiac procedures. The use of QR code bracelets for postoperative CHD patients has shown high levels of satisfaction from families and providers, potentially reducing medical errors and treatment delays.


Asunto(s)
Cardiopatías Congénitas , Humanos , Cardiopatías Congénitas/terapia , Cardiopatías Congénitas/cirugía , Proyectos Piloto , Estudios Prospectivos , Femenino , Masculino , Cuidados Posoperatorios/métodos , Niño , Estudios de Factibilidad , Preescolar , Procedimientos Quirúrgicos Cardíacos , Lactante , Alta del Paciente , Encuestas y Cuestionarios
5.
Arthritis Care Res (Hoboken) ; 76(3): 438-439, 2024 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-37818722
6.
Artículo en Inglés | MEDLINE | ID: mdl-38050634

RESUMEN

Background and aim: We examined error-driven learning in fMRI activity of 217 subjects in a stop signal task to obtain a more robust characterization of the relation between behavioral measures of learning and corresponding neural learning signals than previously possible. Methods: The stop signal task is a two-alternative forced choice in which participants respond to an arrow by pressing a left or right button but must inhibit that response on 1 in 7 trials when cued by an auditory "stop signal." We examined post-error learning by comparing brain activity (BOLD signal) and behavioral responses on trials preceded by successful (correct stop) vs. failed (failed stop) inhibition. Results: There was strong evidence of greater bilateral striatal activity in the period immediately following correct (vs. failed) stop trials (most evident in the putamen; peak MNI coordinates [-26 8 -2], 430 voxels, p < 0.001; [24 14 0], 527 voxels, p < 0.001). We measured median activity in the bilateral striatal cluster following every failed stop and correct stop trial and correlated it with learning signals for (a) probability and (b) latency of the stop signal. In a mixed-effects model predicting activity 5-10 s after the stop signal, both reaction time (RT) change (B = -0.05, t = 3.0, χ2 = 11.3, p < 0.001) and probability of stop trial change (B = 1.53, t = 6.0, χ2 = 43.0, p < 0.001) had significant within-subjects effects on median activity. In a similar mixed model predicting activity 1-5 s after the stop signal, only probability of stop trial change was predictive. Conclusions: A mixed-effects model indicates the striatal activity might be a learning signal that encodes reaction time change and the current expected probability of a stop trial occuring. This extends existing evidence that the striatum encodes a reward prediction error signal for learning within the stop signal task, and demonstrates for the first time that this signal seems to encode both change in stop signal probability and in stop signal delay.

7.
Infect Dis Health ; 28(4): 271-275, 2023 11.
Artículo en Inglés | MEDLINE | ID: mdl-37316338

RESUMEN

BACKGROUND: Hospital administrative coding may underestimate the true incidence of influenza-associated hospitalisation. Earlier availability of test results could lead to improved accuracy of administrative coding. METHODS: In this study we evaluated International Classification of Diseases 10 (ICD-10) coding for influenza (with [J09-J10] or without [J11] virus identified) in adult inpatients who underwent testing in the year prior, compared to those in the 2.5 years after, the introduction of rapid PCR testing in 2017. Other factors associated with influenza coding were evaluated using logistic regression. Discharge summaries were audited to assess the impact of documentation and result availability on coding accuracy. RESULTS: Influenza was confirmed by laboratory testing in 862 of 5755 (15%) patients tested after rapid PCR introduction compared with 170 of 926 (18%) prior. Following the introduction of rapid testing there was a significant increase in patients allocated J09 or J10 ICD-10 codes (768 of 860 [89%] vs 107 of 140 [79%], P = 0.001). On multivariable analysis, factors independently associated with correct coding were rapid PCR testing (aOR 4.36 95% CI [2.75-6.90]) and increasing length of stay (aOR 1.01, 95% CI [1.00-1.01]). Correctly coded patients were more likely to have documentation of influenza in their discharge summaries (95 of 101 [89%] vs 11 of 101 [10%], P < 0.001) and less likely to have pending results at discharge (8 of 101 [8%] vs 65 of 101 [61%], P < 0.001). CONCLUSION: The introduction of rapid PCR testing for influenza was associated with more accurate hospital coding. One possible explanation is faster test turnaround leading to improvement in clinical documentation.


Asunto(s)
Gripe Humana , Adulto , Humanos , Gripe Humana/diagnóstico , Gripe Humana/epidemiología , Prueba de Diagnóstico Rápido , Hospitalización , Hospitales , Alta del Paciente
8.
Arthritis Rheumatol ; 75(8): 1299-1311, 2023 08.
Artículo en Inglés | MEDLINE | ID: mdl-37227071

RESUMEN

OBJECTIVE: To develop initial American College of Rheumatology (ACR) guidelines on the use of exercise, rehabilitation, diet, and additional interventions in conjunction with disease-modifying antirheumatic drugs (DMARDs) as part of an integrative management approach for people with rheumatoid arthritis (RA). METHODS: An interprofessional guideline development group constructed clinically relevant Population, Intervention, Comparator, and Outcome (PICO) questions. A literature review team then completed a systematic literature review and applied the Grading of Recommendations Assessment, Development and Evaluation (GRADE) approach to rate the certainty of evidence. An interprofessional Voting Panel (n = 20 participants) that included 3 individuals with RA achieved consensus on the direction (for or against) and strength (strong or conditional) of recommendations. RESULTS: The Voting Panel achieved consensus on 28 recommendations for the use of integrative interventions in conjunction with DMARDs for the management of RA. Consistent engagement in exercise received a strong recommendation. Of 27 conditional recommendations, 4 pertained to exercise, 13 to rehabilitation, 3 to diet, and 7 to additional integrative interventions. These recommendations are specific to RA management, recognizing that other medical indications and general health benefits may exist for many of these interventions. CONCLUSION: This guideline provides initial ACR recommendations on integrative interventions for the management of RA to accompany DMARD treatments. The broad range of interventions included in these recommendations illustrates the importance of an interprofessional, team-based approach to RA management. The conditional nature of most recommendations requires clinicians to engage persons with RA in shared decision-making when applying these recommendations.


Asunto(s)
Antirreumáticos , Artritis Reumatoide , Reumatología , Humanos , Estados Unidos , Artritis Reumatoide/tratamiento farmacológico , Antirreumáticos/uso terapéutico , Dieta , Terapia por Ejercicio
9.
Arthritis Care Res (Hoboken) ; 75(8): 1603-1615, 2023 08.
Artículo en Inglés | MEDLINE | ID: mdl-37227116

RESUMEN

OBJECTIVE: To develop initial American College of Rheumatology (ACR) guidelines on the use of exercise, rehabilitation, diet, and additional interventions in conjunction with disease-modifying antirheumatic drugs (DMARDs) as part of an integrative management approach for people with rheumatoid arthritis (RA). METHODS: An interprofessional guideline development group constructed clinically relevant Population, Intervention, Comparator, and Outcome (PICO) questions. A literature review team then completed a systematic literature review and applied the Grading of Recommendations Assessment, Development and Evaluation (GRADE) approach to rate the certainty of evidence. An interprofessional Voting Panel (n = 20 participants) that included 3 individuals with RA achieved consensus on the direction (for or against) and strength (strong or conditional) of recommendations. RESULTS: The Voting Panel achieved consensus on 28 recommendations for the use of integrative interventions in conjunction with DMARDs for the management of RA. Consistent engagement in exercise received a strong recommendation. Of 27 conditional recommendations, 4 pertained to exercise, 13 to rehabilitation, 3 to diet, and 7 to additional integrative interventions. These recommendations are specific to RA management, recognizing that other medical indications and general health benefits may exist for many of these interventions. CONCLUSION: This guideline provides initial ACR recommendations on integrative interventions for the management of RA to accompany DMARD treatments. The broad range of interventions included in these recommendations illustrates the importance of an interprofessional, team-based approach to RA management. The conditional nature of most recommendations requires clinicians to engage persons with RA in shared decision-making when applying these recommendations.


Asunto(s)
Antirreumáticos , Artritis Reumatoide , Reumatología , Humanos , Estados Unidos , Artritis Reumatoide/diagnóstico , Artritis Reumatoide/tratamiento farmacológico , Antirreumáticos/uso terapéutico , Dieta , Terapia por Ejercicio
10.
J Am Chem Soc ; 145(19): 10505-10511, 2023 05 17.
Artículo en Inglés | MEDLINE | ID: mdl-37141595

RESUMEN

Covalent epigenetic modifications contribute to the regulation of important cellular processes during development and differentiation, and changes in their genomic distribution and frequency are linked to the emergence of genetic disease states. Chemical and enzymatic methods that selectively target the orthogonal chemical functionality of epigenetic markers are central to the study of their distribution and function, and considerable research effort has been focused on the development of nondestructive sequencing approaches which preserve valuable DNA samples. Photoredox catalysis enables transformations with tunable chemoselectivity under mild, biocompatible reaction conditions. We report the reductive decarboxylation of 5-carboxycytosine via a novel iridium-based treatment, which represents the first application of visible-light photochemistry to epigenetic sequencing via direct base conversion. We propose that the reaction involves an oxidative quenching cycle beginning with single-electron reduction of the nucleobase by the photocatalyst, followed by hydrogen atom transfer from a thiol. The saturation of the C5-C6 backbone permits decarboxylation of the nonaromatic intermediate, and hydrolysis of the N4-amine constitutes a conversion from a cytosine derivative to a T-like base. This conversion demonstrates selectivity for 5-carboxycytosine over other canonical or modified nucleoside monomers, and is thereby applied to the sequencing of 5-carboxycytosine within modified oligonucleotides. The photochemistry explored in this study can also be used in conjunction with enzymatic oxidation by TET to profile 5-methylcytosine at single-base resolution. Compared to other base-conversion treatments, the rapid photochemical reaction takes place within minutes, which could provide advantages for high-throughput detection and diagnostic applications.


Asunto(s)
5-Metilcitosina , Citosina , Oxidación-Reducción , ADN/metabolismo
11.
Clin Infect Dis ; 77(7): 976-986, 2023 10 05.
Artículo en Inglés | MEDLINE | ID: mdl-37235212

RESUMEN

BACKGROUND: Patients without human immunodeficiency virus (HIV) are increasingly recognized as being at risk for cryptococcosis. Knowledge of characteristics of cryptococcosis in these patients remains incomplete. METHODS: We conducted a retrospective study of cryptococcosis in 46 Australian and New Zealand hospitals to compare its frequency in patients with and without HIV and describe its characteristics in patients without HIV. Patients with cryptococcosis between January 2015 and December 2019 were included. RESULTS: Of 475 patients with cryptococcosis, 90% were without HIV (426 of 475) with marked predominance in both Cryptococcus neoformans (88.7%) and Cryptococcus gattii cases (94.3%). Most patients without HIV (60.8%) had a known immunocompromising condition: cancer (n = 91), organ transplantation (n = 81), or other immunocompromising condition (n = 97). Cryptococcosis presented as incidental imaging findings in 16.4% of patients (70 of 426). The serum cryptococcal antigen test was positive in 85.1% of tested patients (319 of 375); high titers independently predicted risk of central nervous system involvement. Lumbar puncture was performed in 167 patients to screen for asymptomatic meningitis, with a positivity rate of 13.2% where meningitis could have been predicted by a high serum cryptococcal antigen titer and/or fungemia in 95% of evaluable cases. One-year all-cause mortality was 20.9% in patients without HIV and 21.7% in patients with HIV (P = .89). CONCLUSIONS: Ninety percent of cryptococcosis cases occurred in patients without HIV (89% and 94% for C. neoformans and C. gattii, respectively). Emerging patient risk groups were evident. A high level of awareness is warranted to diagnose cryptococcosis in patients without HIV.


Asunto(s)
Criptococosis , Cryptococcus gattii , Cryptococcus neoformans , Infecciones por VIH , Meningitis , Humanos , VIH , Estudios Retrospectivos , Nueva Zelanda/epidemiología , Australia/epidemiología , Criptococosis/diagnóstico , Criptococosis/epidemiología , Hospitales , Antígenos Fúngicos , Infecciones por VIH/complicaciones , Infecciones por VIH/epidemiología
12.
J Am Med Dir Assoc ; 24(5): 599-608, 2023 05.
Artículo en Inglés | MEDLINE | ID: mdl-36958373

RESUMEN

OBJECTIVES: Physicians, nurse practitioners (NPs), and physician assistants (PAs) are key to the effective delivery of medical care in nursing homes (NHs). Although several studies have reported on the relationship between the care delivered by a given discipline and specific clinical outcomes, the mediating effect of physician practice characteristics is unknown. A scoping review was conducted to determine whether studies examining the impact of NP and PA care in NHs have accounted for both the collaborative relationship between themselves and physicians as well as physician practice size and type. DESIGN: Scoping review. SETTINGS AND PARTICIPANTS: NH and NH residents. METHODS: Papers eligible for review included peer-reviewed studies written in English and that were quantitative in nature. Inclusion criteria required that more than 1 NH and more than a single NP or PA be included for the analysis. Further, the size of the NH studied must have equaled or exceeded 100 residents and more than 1 clinical outcome reported. Databases searched included Ovid MEDLINE, Cochrane Library, Web of Science; CINAHL, and AgeLine. RESULTS: A total of 1878 studies underwent abstract review of which 1719 were excluded. A full-text review of the remaining articles was completed (n = 157, as 2 articles could not be retrieved), of which 16 met eligibility criteria. The study designs were generally retrospective and quasi-experimental in nature. No randomized controlled studies were identified. Physician practice variables such as number of physicians, total practice case load, case mix, and the nature of the collaborative practice between NP/PA and MD were infrequently specified. In no reports was the type of physician practice characterized and no physician practice variables were adjusted for with regard to outcomes. CONCLUSIONS: None of the studies included in the review were found to have incorporated any physician variables into their outcome analyses. Before purporting equivalency between medical provider disciplines in NHs, future studies must, at the very least, consider the mediating effect of physician practice characteristics.


Asunto(s)
Enfermeras Practicantes , Asistentes Médicos , Médicos , Humanos , Estudios Retrospectivos , Casas de Salud
13.
World J Pediatr Congenit Heart Surg ; 14(2): 227-230, 2023 03.
Artículo en Inglés | MEDLINE | ID: mdl-36952283

RESUMEN

A 21-month-old boy was diagnosed with partial anomalous pulmonary venous connection, with the right upper pulmonary veins draining to the superior vena cava (SVC). Intraoperatively, it became evident that the right upper pulmonary veins connected to the azygous vein before draining to the SVC.


Asunto(s)
Venas Pulmonares , Síndrome de Cimitarra , Masculino , Humanos , Lactante , Vena Cava Superior/cirugía , Vena Cava Superior/anomalías , Toracotomía , Vena Ácigos/cirugía , Síndrome de Cimitarra/diagnóstico por imagen , Síndrome de Cimitarra/cirugía , Venas Pulmonares/cirugía , Venas Pulmonares/anomalías
14.
J Neurosci ; 43(13): 2291-2304, 2023 03 29.
Artículo en Inglés | MEDLINE | ID: mdl-36828637

RESUMEN

Increasing spike rates drive greater neuronal energy demand. In turn, mitochondrial ATP production leads to the generation of reactive oxygen species (ROS) that can modulate ion channel gating. Does ROS production autoregulate the excitability of a neuron? We investigated the links between retinal ganglion cell (RGC) excitability and spike activity-driven ROS production in male and female mice. Changes to the light-evoked and current-evoked spike patterns of functionally identified αRGC subtypes, along with their NaV channel-gating properties, were recorded during experimentally induced decreases and increases of intracellular ROS. During periods of highest spike rates (e.g., following light onset in ON sustained RGCs and light offset in OFF sustained RGCs), these αRGC subtypes responded to reductions of ROS (induced by catalase or glutathione monoethyl ester) with higher spike rates. Increases in ROS (induced by mercaptosuccinate, antimycin-A, or H2O2) lowered spike rates. In ON and OFF transient RGCs, there were no changes in spike rate during ROS decreases but increased ROS increased spiking. This suggests that endogenous ROS are intrinsic neuromodulators in RGCs having high metabolic demands but not in RGCs with lower energy needs. We identified ROS-induced shifts in the voltage-dependent gating of specific isoforms of NaV channels that account for the modulation of ON and OFF sustained RGC spike frequency by ROS-mediated feedback. ROS-induced changes to NaV channel gating, affecting activation and inactivation kinetics, are consistent with the differing spike pattern alterations observed in RGC subtypes. Cell-autonomous generation of ROS during spiking contributes to tuning the spike patterns of RGCs.SIGNIFICANCE STATEMENT Energy production within retinal ganglion cells (RGCs) is accompanied by metabolic by-products harmful to cellular function. How these by-products modulate the excitability of RGCs bears heavily on visual function and the etiology of optic neuropathies. A novel hypothesis of how RGC metabolism can produce automodulation of electrical signaling was tested by identifying the characteristics and biophysical origins of changes to the excitability of RGCs caused by oxidizing by-products in the retina. This impacts our understanding of the pathophysiology of RGC dysfunction, supporting an emerging model in which increases in oxidizing chemical species during energy production, but not necessarily bioenergetic failure, lead to preferential degeneration of specific subtypes of RGCs, yielding loss of different aspects of visual capacity.


Asunto(s)
Peróxido de Hidrógeno , Células Ganglionares de la Retina , Ratones , Femenino , Masculino , Animales , Especies Reactivas de Oxígeno , Células Ganglionares de la Retina/fisiología , Retina , Transducción de Señal
15.
Arthritis Rheumatol ; 75(3): 333-348, 2023 03.
Artículo en Inglés | MEDLINE | ID: mdl-36597810

RESUMEN

OBJECTIVE: To provide evidence-based recommendations on the use of vaccinations in children and adults with rheumatic and musculoskeletal diseases (RMDs). METHODS: This guideline follows American College of Rheumatology (ACR) policy guiding management of conflicts of interest and disclosures and the ACR guideline development process, which includes the Grading of Recommendations Assessment, Development and Evaluation (GRADE) methodology. It also adheres to the Appraisal of Guidelines for Research and Evaluation (AGREE) criteria. A core leadership team consisting of adult and pediatric rheumatologists and a guideline methodologist drafted clinical population, intervention, comparator, outcomes (PICO) questions. A review team performed a systematic literature review for the PICO questions, graded the quality of evidence, and produced an evidence report. An expert Voting Panel reviewed the evidence and formulated recommendations. The panel included adult and pediatric rheumatology providers, infectious diseases specialists, and patient representatives. Consensus required ≥70% agreement on both the direction and strength of each recommendation. RESULTS: This guideline includes expanded indications for some vaccines in patients with RMDs, as well as guidance on whether to hold immunosuppressive medications or delay vaccination to maximize vaccine immunogenicity and efficacy. Safe approaches to the use of live attenuated vaccines in patients taking immunosuppressive medications are also addressed. Most recommendations are conditional and had low quality of supporting evidence. CONCLUSION: Application of these recommendations should consider patients' individual risk for vaccine-preventable illness and for disease flares, particularly if immunosuppressive medications are held for vaccination. Shared decision-making with patients is encouraged in clinical settings.


Asunto(s)
Antirreumáticos , Enfermedades Musculoesqueléticas , Reumatología , Niño , Humanos , Estados Unidos , Antirreumáticos/uso terapéutico , Enfermedades Musculoesqueléticas/tratamiento farmacológico , Vacunación
16.
Arthritis Care Res (Hoboken) ; 75(3): 449-464, 2023 03.
Artículo en Inglés | MEDLINE | ID: mdl-36597813

RESUMEN

OBJECTIVE: To provide evidence-based recommendations on the use of vaccinations in children and adults with rheumatic and musculoskeletal diseases (RMDs). METHODS: This guideline follows American College of Rheumatology (ACR) policy guiding management of conflicts of interest and disclosures and the ACR guideline development process, which includes the Grading of Recommendations Assessment, Development and Evaluation (GRADE) methodology. It also adheres to the Appraisal of Guidelines for Research and Evaluation (AGREE) criteria. A core leadership team consisting of adult and pediatric rheumatologists and a guideline methodologist drafted clinical population, intervention, comparator, outcomes (PICO) questions. A review team performed a systematic literature review for the PICO questions, graded the quality of evidence, and produced an evidence report. An expert Voting Panel reviewed the evidence and formulated recommendations. The panel included adult and pediatric rheumatology providers, infectious diseases specialists, and patient representatives. Consensus required ≥70% agreement on both the direction and strength of each recommendation. RESULTS: This guideline includes expanded indications for some vaccines in patients with RMDs, as well as guidance on whether to hold immunosuppressive medications or delay vaccination to maximize vaccine immunogenicity and efficacy. Safe approaches to the use of live attenuated vaccines in patients taking immunosuppressive medications are also addressed. Most recommendations are conditional and had low quality of supporting evidence. CONCLUSION: Application of these recommendations should consider patients' individual risk for vaccine-preventable illness and for disease flares, particularly if immunosuppressive medications are held for vaccination. Shared decision-making with patients is encouraged in clinical settings.


Asunto(s)
Antirreumáticos , Enfermedades Musculoesqueléticas , Enfermedades Reumáticas , Reumatología , Niño , Humanos , Estados Unidos , Antirreumáticos/uso terapéutico , Enfermedades Musculoesqueléticas/tratamiento farmacológico , Vacunación , Enfermedades Reumáticas/tratamiento farmacológico
17.
Cogn Affect Behav Neurosci ; 22(2): 244-257, 2022 04.
Artículo en Inglés | MEDLINE | ID: mdl-34676496

RESUMEN

We present a multi-attribute incentive salience (MAIS) model as a computational account of incentive salience in model-based Pavlovian learning. A model of incentive salience as a joint function of reward value and physiological state has been previously proposed by Zhang et al. (2009). In that model, the function takes additive or multiplicative forms depending on whether a preference shifts from positive to negative or vice versa. We demonstrate that arbitrarily varying this function is unnecessary to explain observed data. A multiplicative function is sufficient if one takes into account empirical data suggesting the incentive salience function for an incentive is comprised of multiple physiological signals. We compare our model to the previously proposed model on two datasets. We find the MAIS model predicts the outcomes equally well, fits empirical data describing multiple sensory representations of a single stimulus, better approximates the dual-structure appetitive-aversive nature of the reward system, is compatible with existing knowledge about incentive salience in Pavlovian learning, and better describes revaluation in Pavlovian learning. This model addresses a call (Dayan & Berridge, 2014) for algorithmic and computational models of model-based Pavlovian learning that consistently and fully explain empirical observations. Because a multi-attribute model is relevant even for simple Pavlovian associations, it should be useful in a wide variety of decision-making contexts, including agent modeling and addiction research.


Asunto(s)
Conducta Adictiva , Motivación , Señales (Psicología) , Humanos , Aprendizaje/fisiología , Recompensa
18.
R Soc Open Sci ; 8(11): 210904, 2021 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-34804569

RESUMEN

Slowing the spread of COVID-19 requires people to actively change their lives by following protective practices, such as physical distancing and disinfecting their hands. Perceptions about the personal risk of COVID-19 may affect compliance with these practices. In this study, we assessed risk perception and optimism about COVID-19 in a multinational (UK, USA and Germany), longitudinal design during the early stages of the pandemic (16 March 2020; 1 April 2020; 20 May 2020). Our main findings are that (i) people showed a comparative optimism bias about getting infected and infecting others, but not for getting severe symptoms, (ii) this optimism bias did not change over time, (iii) optimism bias seemed to relate to perceived level of control over the action, (iv) risk perception was linked to publicly available information about the disorder, (v) people reported adhering closely to protective measures but these measures did not seem to be related to risk perception, and (vi) risk perception was related to questions about stress and anxiety. In additional cross-sectional samples, we replicated our most important findings. Our open and partly preregistered results provide detailed descriptions of risk perceptions and optimistic beliefs during the early stages of the COVID-19 pandemic in three Western countries.

19.
Front Psychol ; 12: 695389, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-34512452

RESUMEN

Avatars or agents are digitized self-representations of a player in mediated environments. While using agents to navigate through mediated environments, players form bonds with their self-agents or characters, a process referred to as identification. Identification can involve automatic, but temporary, self-concept "shifts in implicit self-perceptions" (Klimmt et al., 2010, p. 323) of the media user by adopting or emphasizing the action choices on behalf of the social expectation of the avatar in the mediated environment. In the current study, we test the possibility that users' identification with video game avatars-a bond built between avatars and players- would account for subsequent behavior changes. We did so by using 3-month longitudinal data involving a narratively-based serious game: Socially Optimized Learning in Virtual Environments (SOLVE), a 3D-interactive game designed to reduce risky sexual behaviors among young men who have sex with men (n = 444). Results show that video game identification predicts both the reduction of risky sexual behaviors over time, and reduction in the number of non-primary partners with whom risky sex occurs. And when players identify with the game character, they tend to make healthier choices, which significantly mediates the link between video game identification and reduction of risky behaviors.

20.
Arthritis Rheumatol ; 73(7): 1108-1123, 2021 07.
Artículo en Inglés | MEDLINE | ID: mdl-34101376

RESUMEN

OBJECTIVE: To develop updated guidelines for the pharmacologic management of rheumatoid arthritis. METHODS: We developed clinically relevant population, intervention, comparator, and outcomes (PICO) questions. After conducting a systematic literature review, the Grading of Recommendations Assessment, Development and Evaluation (GRADE) approach was used to rate the certainty of evidence. A voting panel comprising clinicians and patients achieved consensus on the direction (for or against) and strength (strong or conditional) of recommendations. RESULTS: The guideline addresses treatment with disease-modifying antirheumatic drugs (DMARDs), including conventional synthetic DMARDs, biologic DMARDs, and targeted synthetic DMARDs, use of glucocorticoids, and use of DMARDs in certain high-risk populations (i.e., those with liver disease, heart failure, lymphoproliferative disorders, previous serious infections, and nontuberculous mycobacterial lung disease). The guideline includes 44 recommendations (7 strong and 37 conditional). CONCLUSION: This clinical practice guideline is intended to serve as a tool to support clinician and patient decision-making. Recommendations are not prescriptive, and individual treatment decisions should be made through a shared decision-making process based on patients' values, goals, preferences, and comorbidities.


Asunto(s)
Antirreumáticos/uso terapéutico , Artritis Reumatoide/tratamiento farmacológico , Glucocorticoides/uso terapéutico , Artritis Reumatoide/fisiopatología , Productos Biológicos/uso terapéutico , Quimioterapia Combinada , Humanos , Inhibidores de las Cinasas Janus/uso terapéutico , Reumatología , Índice de Severidad de la Enfermedad , Sociedades Médicas , Inhibidores del Factor de Necrosis Tumoral/uso terapéutico , Estados Unidos
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