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1.
J Drug Educ ; 52(1-2): 3-15, 2023 03.
Artículo en Inglés | MEDLINE | ID: mdl-37434400

RESUMEN

We examined the impact of distance learning-related parental stress due to COVID-19 on parental alcohol consumption using an online survey in May 2020 with a convenience sample of U.S. adults. This article focuses on the 361 parents who had children under the age of 18 living with them. Seventy-eight percent had children who were engaged in distance learning; 59% reported being stressed because they were not sure how to help their children with distance learning. Stressed parents reported consuming significantly more alcohol and binge drinking more often than parents who were not stressed by distance learning. We hope that public health professionals can use our findings to better target alcohol prevention programs aimed at parents to reduce parental stress, and hopefully, parental alcohol consumption.


Asunto(s)
COVID-19 , Educación a Distancia , Adulto , Humanos , Niño , Consumo de Bebidas Alcohólicas/epidemiología , Consumo de Bebidas Alcohólicas/prevención & control , Padres , Relaciones Padres-Hijo
2.
Subst Abus ; 43(1): 1139-1144, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-35471927

RESUMEN

Background: Alcohol consumption in the U.S. is a public health problem that has been exacerbated by the COVID-19 pandemic. Relatedly, many states have responded to COVID-19 by relaxing their alcohol laws, making it possible for adults to have alcohol delivered to their homes. This study sought to understand the impact of allowing alcohol home delivery on self-reported adult alcohol consumption in the US. Methods: In May 2020, we surveyed a convenience sample of U.S. adults over 21 years of age recruited through social media and listservs. Eight hundred and thirty-two participants completed the online survey: 84% were female, 85% were White, and 72% were between the ages of 26 and 49. Results: Twenty-one percent of participants who consumed alcohol in the past month had at least some alcohol delivered, with 60% having it delivered from liquor stores, restaurants, or bars. The remainder of the participants purchased the alcohol in-person or owned it pre-COVID-19. Participants who reported having alcohol delivered also reported consuming more drinks (ß = 13.3; 95% CI [8.2, 18.4]; p < .000) and drinking on more days (ß = 5.0; 95% CI [2.9, 7.0]; p < .000) over the past month than participants who obtained alcohol through other methods. Participants who had alcohol delivered were nearly two times more likely to report engaging in binge drinking than those who obtained alcohol through other methods (OR = 1.96; 95% CI [1.3, 3.1]; p = .003). Conclusions: Obtaining alcohol through home delivery was associated with greater alcohol consumption including binge drinking. As states consider permanently allowing alcohol home delivery, it is important to consider the potential public health implications.


Asunto(s)
Consumo Excesivo de Bebidas Alcohólicas , COVID-19 , Medios de Comunicación Sociales , Adulto , Consumo de Bebidas Alcohólicas/epidemiología , Consumo Excesivo de Bebidas Alcohólicas/epidemiología , Femenino , Humanos , Masculino , Persona de Mediana Edad , Pandemias
3.
Int J Mol Sci ; 23(24)2022 Dec 13.
Artículo en Inglés | MEDLINE | ID: mdl-36555487

RESUMEN

Converging lines of evidence suggest that an imbalance between excitation and inhibition is present in the dorsolateral prefrontal cortex (DLPFC) of schizophrenia (SCZ). Gamma-aminobutyric-acid (GABA) and, to a lesser extent, glutamate (Glu) abnormalities were reported in the DLPFC of SCZ patients, especially on the right hemisphere, by post-mortem studies. However, in vivo evidence of GABA, Glu, and Glu/GABA DLPFC abnormalities, particularly on the right side and the early stages of illness, is limited. In this preliminary study, we utilized 7-Tesla magnetic resonance spectroscopic imaging (MRSI) to investigate bilateral Glu/Creatine (Cre), GABA/Cre, and Glu/GABA in the DLPFC of sixteen first episode schizophrenia (FES), seventeen clinical high risk (CHR), and twenty-six healthy comparison (HC) subjects. FES and CHR had abnormal GABA/Cre and Glu/GABA in the right DLPFC (rDLPFC) compared with HC participants, while no differences were observed in the left DLPFC (lDLPFC) among the three groups. Furthermore, HC had higher Glu/GABA in rDLPFC compared to lDLPFC (R > L), whereas the opposite relationship (R < L) was observed in the DLPFC Glu/GABA of FES patients. Altogether, these findings indicate that GABA/Cre and Glu/GABA DLPFC alterations are present before illness manifestation and worsen in FES patients, thus representing a putative early pathophysiological biomarker for SCZ and related psychotic disorders.


Asunto(s)
Ácido Glutámico , Esquizofrenia , Humanos , Corteza Prefontal Dorsolateral , Esquizofrenia/diagnóstico por imagen , Corteza Prefrontal/diagnóstico por imagen , Imagen por Resonancia Magnética , Ácido gamma-Aminobutírico , Espectroscopía de Resonancia Magnética/métodos
4.
Int J Educ Res ; 112: 101941, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-35136282

RESUMEN

Research continues to emerge about the impact of COVID-19 on education; however, reports about the impact on students receiving special education services are more limited. This study examined parental views of distance learning for students with disabilities during the COVID-19 crisis. Using a survey disseminated via social media, we examined parents' views (N = 153) of PK-12 education for students receiving special education services during COVID-19. Results indicated three main themes: (1) special education and related service hours were decreased during virtual learning; (2) parents reported that their children were unable to participate in virtual learning without significant adult support; (3) parents often were unable to provide their children with assistance due to other commitments including work and childcare.

5.
Neonatal Netw ; 38(4): 206-216, 2019 Jul 01.
Artículo en Inglés | MEDLINE | ID: mdl-31470389

RESUMEN

PURPOSE: To evaluate the effect of a NICU parent education program on parents' early language and literacy practices, and on their confidence interpreting and responding to infant signals. DESIGN: Single group, pre- and post-test, mixed-methods evaluation design. SAMPLE: One hundred and four parents and other caregivers completed questionnaires before and after the one-hour program. Ten parents participated in follow-up interviews. MAIN OUTCOME VARIABLES: Before and after sessions, participants reported on frequency of their current and intended early language and literacy practices, and their confidence interpreting and responding to infant signals. Participants also reported program satisfaction. Interview participants reported their behavior change one to two weeks later. RESULTS: The program significantly increased intention to engage in more early language and literacy practices, and increased parent-reported knowledge of how and when to interact with their infants. The majority of interviewed parents reported engaging in these practices one to two weeks later.


Asunto(s)
Cuidadores/educación , Alfabetización en Salud , Cuidado del Lactante/métodos , Unidades de Cuidado Intensivo Neonatal/organización & administración , Enfermería Neonatal/educación , Padres/educación , Adulto , Femenino , Humanos , Lactante , Recién Nacido , Masculino , Encuestas y Cuestionarios
6.
Psychiatry Res ; 317: 114926, 2022 11.
Artículo en Inglés | MEDLINE | ID: mdl-36932470

RESUMEN

Cognitive dysfunction is a core feature of schizophrenia (SCZ), which unfavorably affects SCZ patients' daily functioning and overall clinical outcome. An increasing body of evidence has shown that cognitive deficits are present not only at the beginning of the illness but also several years before the onset of psychosis. Nonetheless, the majority of treatment interventions targeting cognitive dysfunction in SCZ, using both pharmacological and nonpharmacological approaches, have focused on chronic patients rather than individuals at high risk or in the early stages of the disease. In this article, we provide a narrative review of cognitive interventions in SCZ patients, with a particular focus on pre-emptive interventions in at-risk/early course individuals when available. Furthermore, we discuss current challenges for these pre-emptive treatment interventions and provide some suggestions on how future work may ameliorate cognitive dysfunction in these individuals.


Asunto(s)
Trastornos del Conocimiento , Disfunción Cognitiva , Trastornos Psicóticos , Esquizofrenia , Humanos , Esquizofrenia/terapia , Esquizofrenia/tratamiento farmacológico , Trastornos Psicóticos/psicología , Trastornos del Conocimiento/etiología , Trastornos del Conocimiento/terapia , Disfunción Cognitiva/etiología , Disfunción Cognitiva/terapia , Cognición
7.
J Psychiatr Res ; 151: 272-278, 2022 07.
Artículo en Inglés | MEDLINE | ID: mdl-35523067

RESUMEN

Subcortical structures play a critical role the pathophysiology and treatment of schizophrenia (SZ), yet underlying neurophysiological processes, in vivo, remain largely unexplored. Brain tissue iron, which can be measured with magnetic resonance-based methods, is a crucial component of a variety of neuronal functions including neurotransmitter synthesis. Here we used a proxy measure of tissue iron to examine basal ganglia and thalamic structures in an adult cohort of individuals with chronic SZ. A publicly available dataset of 72 individuals with SZ between ages 18 and 65, and a matched sample of 74 healthy control (HC) participants were included. A novel method that calculated the inverse-normalized T2*-weighted contrast (1/nT2*) was used to estimate brain iron within the basal ganglia and thalamus. Between group, age- and sex-related differences in 1/nT2* were examined, in addition to correlations with measures of psychopathology and cognition. Individuals with SZ showed greater 1/nT2* (iron index) compared to HCs in the thalamus (p < 0.01, FWE corrected). Age-related 1/nT2* accumulation was noted in regions of the basal ganglia, coinciding with prior work, and prominent sex-differences were noted in the caudate and thalamus (p < 0.01, FWE corrected). No significant relationship was observed between 1/nT2* and measures of neurocognition or psychopathology. Overall, our findings characterize a non-invasive proxy measure of tissue iron in SZ and highlight thalamic iron accumulation as a potential marker of illness.


Asunto(s)
Esquizofrenia , Adolescente , Adulto , Anciano , Encéfalo , Humanos , Hierro , Imagen por Resonancia Magnética/métodos , Persona de Mediana Edad , Tálamo/diagnóstico por imagen , Adulto Joven
8.
Schizophr Res ; 248: 98-106, 2022 10.
Artículo en Inglés | MEDLINE | ID: mdl-36029656

RESUMEN

Individuals with first-episode schizophrenia (FES) typically present with acute psychotic symptoms. Though antipsychotic drugs are the mainstay for treatment, the neurobiology underlying successful treatment remains largely elusive. Recent evidence from functional connectivity studies highlights the insula as a key structure in the neural mechanism of response. However, molecular contributions to response across insular regions remain largely unknown. We used 7-Tesla magnetic resonance spectroscopic imaging (MRSI) to measure glutamate (Glu), Glutamine (Gln), and GABA from anterior and posterior regions of the insula across antipsychotic treatment. A total of 36 participants were examined, including 15 individuals with FES and moderate to severe psychosis who were scanned at two time points, while starting and after 6 weeks of antipsychotic treatment. Symptoms were carefully monitored across the study period to characterize treatment response. GABA, Glu, and Gln levels were calculated relative to creatine in anterior and posterior insular regions, bilaterally. In relation to psychotic symptom reduction, we observed a significant increase in Glu across all insular regions with (p < 0.001), but no corresponding changes in Gln or GABA. In group analyses, the FES cohort showed lower levels of Glu (p < 0.001) and GABA (p = 0.02) at baseline. Finally, in exploratory analyses, treatment remitters demonstrated a normalization of lower insular Glu levels across treatment, unlike non-remitters. Overall, these findings contribute to our understating of molecular changes associated with antipsychotic response and demonstrate abnormalities specific to the insula in FES.


Asunto(s)
Antipsicóticos , Esquizofrenia , Humanos , Antipsicóticos/farmacología , Antipsicóticos/uso terapéutico , Esquizofrenia/diagnóstico por imagen , Esquizofrenia/tratamiento farmacológico , Glutamina , Ácido Glutámico , Creatina , Imagen por Resonancia Magnética/métodos , Ácido gamma-Aminobutírico
9.
Expert Opin Ther Targets ; 25(1): 15-26, 2021 01.
Artículo en Inglés | MEDLINE | ID: mdl-33170748

RESUMEN

Introduction: Antipsychotic drugs are central to the treatment of schizophrenia, but their limitations necessitate improved treatment strategies. Multiple lines of research have implicated glutamatergic dysfunction in the hippocampus as an early source of pathophysiology in schizophrenia. Novel compounds have been designed to treat glutamatergic dysfunction, but they have produced inconsistent results in clinical trials. Areas covered: This review discusses how the hippocampus is thought to drive psychotic symptoms through its influence on the dopamine system. It offers the reader an evaluation of proposed treatment strategies including direct modulation of GABA or glutamate neurotransmission or reducing the deleterious impact of stress on circuit development. Finally, we offer a perspective on aspects of future research that will advance our knowledge and may create new therapeutic opportunities. PubMed was searched for relevant literature between 2010 and 2020 and related studies. Expert opinion: Targeting aberrant excitatory-inhibitory neurotransmission in the hippocampus and its related circuits has the potential to alleviate symptoms and reduce the risk of transition to psychosis if implemented as an early intervention. Longitudinal multimodal brain imaging combined with mechanistic theories generated from animal models can be used to better understand the progression of hippocampal-dopamine circuit dysfunction and heterogeneity in treatment response.


Asunto(s)
Antipsicóticos/farmacología , Trastornos Psicóticos/tratamiento farmacológico , Esquizofrenia/tratamiento farmacológico , Animales , Dopamina/metabolismo , Diseño de Fármacos , Glutamatos/metabolismo , Hipocampo/diagnóstico por imagen , Hipocampo/fisiopatología , Humanos , Terapia Molecular Dirigida , Trastornos Psicóticos/fisiopatología , Esquizofrenia/fisiopatología , Ácido gamma-Aminobutírico/metabolismo
10.
Schizophr Bull ; 47(6): 1806-1814, 2021 10 21.
Artículo en Inglés | MEDLINE | ID: mdl-33928393

RESUMEN

Pomaglumetad methionil (POM), a group 2 metabotropic glutamate receptor (mGluR2/3) agonist, showed promise as a novel antipsychotic in preclinical research but failed to show efficacy in clinical trials, though it has been suggested that it may be effective in certain patient populations, including early in disease patients. We used the methyazoxymethanol acetate (MAM) rat model of schizophrenia to determine whether POM may prevent the development of dopamine (DA) system dysfunction in a model representative of the hyperdopaminergic state thought to underlie psychosis, compared to control (SAL) rats. MAM and SAL rats were administered either POM (3 mg/kg, i.p.), vehicle (1 ml/kg), or no injection during postnatal day (PD) 31-40. In either late adolescence (PD 47-56) or adulthood (PD 83-96), novel object recognition (NOR) was tested, followed by anesthetized in vivo electrophysiological recordings of VTA DA neuron activity or ventral hippocampal (vHPC) pyramidal neuron activity. MAM rats treated with POM demonstrated increased NOR in adulthood compared to no injection MAM rats, but not compared to vehicle-treated MAM rats. POM-treated MAM rats demonstrated normalized DA neuron population activity and vHPC pyramidal neuron activity compared to vehicle and no injection MAM rats in both late adolescence and adulthood. No significant differences were observed across treatment groups in SAL rats. These results suggest that peripubertal mGluR2/3 agonist administration can prevent the emergence of vHPC pyramidal neuron hyperactivity and increased DA neuron population activity in adult MAM rats.


Asunto(s)
Aminoácidos/farmacología , Antipsicóticos/farmacología , Conducta Animal/efectos de los fármacos , Agonistas de Aminoácidos Excitadores/farmacología , Hipocampo/efectos de los fármacos , Receptores de Glutamato Metabotrópico/agonistas , Esquizofrenia/tratamiento farmacológico , Área Tegmental Ventral/efectos de los fármacos , Factores de Edad , Aminoácidos/administración & dosificación , Animales , Modelos Animales de Enfermedad , Agonistas de Aminoácidos Excitadores/administración & dosificación , Masculino , Acetato de Metilazoximetanol/farmacología , Neurotoxinas/farmacología , Ratas
11.
J Numer Cogn ; 7(2): 195-220, 2021 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-34778511

RESUMEN

This article synthesizes findings from an international virtual conference, funded by the National Science Foundation (NSF), focused on the home mathematics environment (HME). In light of inconsistencies and gaps in research investigating relations between the HME and children's outcomes, the purpose of the conference was to discuss actionable steps and considerations for future work. The conference was composed of international researchers with a wide range of expertise and backgrounds. Presentations and discussions during the conference centered broadly on the need to better operationalize and measure the HME as a construct - focusing on issues related to child, family, and community factors, country and cultural factors, and the cognitive and affective characteristics of caregivers and children. Results of the conference and a subsequent writing workshop include a synthesis of core questions and key considerations for the field of research on the HME. Findings highlight the need for the field at large to use multi-method measurement approaches to capture nuances in the HME, and to do so with increased international and interdisciplinary collaboration, open science practices, and communication among scholars.

12.
Neuropharmacology ; 163: 107632, 2020 02.
Artículo en Inglés | MEDLINE | ID: mdl-31077730

RESUMEN

Current antipsychotic drugs (APDs) act on D2 receptors, and preclinical studies demonstrate that repeated D2 antagonist administration downregulates spontaneously active DA neurons by producing overexcitation-induced inactivation of firing (depolarization block). Animal models of schizophrenia based on the gestational MAM administration produces offspring with adult phenotypes consistent with schizophrenia, including ventral hippocampal hyperactivity and a DA neuron overactivity. The MAM model reveals that APDs act differently in a hyperdopamineregic system compared to a normal one, including rapid onset of depolarization block in response to acute D2 antagonist administration and downregulation of DA neuron population activity following acute and repeated D2 partial agonist administration, none of which are observed in normal rats. Novel target compounds have been developed based on the theory that glutamatergic dysfunction is central to schizophrenia pathology. Despite showing promise in preclinical research, none of the novel drugs succeeded in clinical trials. However, preclinical research is generally performed in normal, drug-naïve rats, whereas models with disease-relevant pathology and prior APD exposure may improve the predictive validity of preclinical research. Indeed, in MAM rats, chronic D2 antagonist treatment leads to persistent DA supersensitivity that interferes with the response to drugs that target upstream pathology. Moreover, MAM rats revealed that the peri-pubertal period is a stress-sensitive window that can be targeted to prevent the development of MAM pathology in adulthood. Neurodevelopmental models, such as the MAM model, can thus be used to test potential pharmacotherapies that may be able to treat schizophrenia in early stages of the disease. This article is part of the issue entitled 'Special Issue on Antipsychotics'.


Asunto(s)
Antipsicóticos/farmacología , Modelos Animales de Enfermedad , Acetato de Metilazoximetanol , Esquizofrenia/inducido químicamente , Animales , Dopamina/fisiología , Neuronas Dopaminérgicas/efectos de los fármacos , Hipocampo/efectos de los fármacos , Masculino , Ratones , Ratas , Área Tegmental Ventral/efectos de los fármacos
13.
Neuropsychopharmacology ; 45(12): 2106-2113, 2020 11.
Artículo en Inglés | MEDLINE | ID: mdl-32663839

RESUMEN

The group 2 metabotropic glutamate receptor (mGluR2/3) agonist, pomaglumetad methionil (POM), showed promise as a novel antipsychotic in preclinical research but failed to show efficacy in clinical trials, though it has been suggested that it may be effective in certain patient populations. Although previous studies have shown that mGluR2/3 agonists have no effect on dopamine (DA) in wild type rats, we used the methylzoxymethanol acetate (MAM) model to determine whether POM may indirectly normalize DA neuron activity in a model representative of the hyperdopaminergic state thought to underlie psychosis, compared to SAL rats, using in vivo, anesthetized, electrophysiological recordings. POM dose-dependently reduced the number of spontaneously active DA neurons in the VTA of MAM rats to control levels without affecting DA firing in SAL rats, which persisted following 14d repeated treatment with POM. In female MAM rats, POM significantly reduced DA neuron population activity only during proestrous and estrous stages. MAM rats also demonstrated dose-dependent improvement in novel object recognition following acute POM, which was not observed in SAL rats. Similar to the MAM rats, DA neuron population activity was increased in a hippocampal-dependent manner following acute restraint stress. Administration of POM prior to 2 h restraint stress prevented the restraint-induced increase in DA neuron population activity, and this effect was blocked by pretreatment with an mGluR2/3 antagonist. Thus, the ability of POM to reduce the hyperdopaminergic activity in both MAM rats and in wild type rats following restraint stress suggests that it can indirectly regulate DA neuron activity, which may underlie its potential therapeutic effects.


Asunto(s)
Neuronas Dopaminérgicas , Receptores de Glutamato Metabotrópico , Potenciales de Acción , Aminoácidos , Animales , Femenino , Hipocampo , Humanos , Ratas , Ratas Sprague-Dawley , Área Tegmental Ventral
14.
Front Psychiatry ; 11: 613, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32719622

RESUMEN

Dysregulation of the dopamine system is central to many models of the pathophysiology of psychosis in schizophrenia. However, emerging evidence suggests that this dysregulation is driven by the disruption of upstream circuits that provide afferent control of midbrain dopamine neurons. Furthermore, stress can profoundly disrupt this regulatory circuit, particularly when it is presented at critical vulnerable prepubertal time points. This review will discuss the dopamine system and the circuits that regulate it, focusing on the hippocampus, medial prefrontal cortex, thalamic nuclei, and medial septum, and the impact of stress. A greater understanding of the regulation of the dopamine system and its disruption in schizophrenia may provide a more complete neurobiological framework to interpret clinical findings and develop novel treatments.

15.
Artículo en Inglés | MEDLINE | ID: mdl-33316978

RESUMEN

Emerging but limited evidence suggests that alcohol consumption has increased during the COVID-19 pandemic. This study assessed: (1) whether drinking behaviors changed during the pandemic; and, (2) how those changes were impacted by COVID-19-related stress. We conducted a cross-sectional online survey with a convenience sample of U.S. adults over 21 years in May 2020. We conducted adjusted linear regressions to assess COVID-19 stress and alcohol consumption, adjusting for gender, race, ethnicity, age, and household income. A total of 832 responded: 84% female, 85% White, and 72% ages 26-49. Participants reported consuming 26.8 alcohol drinks on 12.2 of the past 30 days. One-third of participants (34.1%) reported binge drinking and 7.0% reported extreme binge drinking. Participants who experienced COVID-19-related stress (versus not) reported consuming more drinks (ß = 4.7; CI (0.2, 9.1); p = 0.040) and a greater number of days drinking (ß = 2.4; CI (0.6, 4.1); p = 0.007). Additionally, 60% reported increased drinking but 13% reported decreased drinking, compared to pre-COVID-19. Reasons for increased drinking included increased stress (45.7%), increased alcohol availability (34.4%), and boredom (30.1%). Participants who reported being stressed by the pandemic consumed more drinks over a greater number of days, which raises concerns from both an individual and public health perspective.


Asunto(s)
Consumo de Bebidas Alcohólicas/epidemiología , Consumo Excesivo de Bebidas Alcohólicas/epidemiología , COVID-19/epidemiología , Adulto , Bebidas Alcohólicas/provisión & distribución , Tedio , Estudios Transversales , Femenino , Humanos , Masculino , Persona de Mediana Edad , Pandemias , Estrés Psicológico
16.
Psychiatry Res ; 284: 112672, 2020 02.
Artículo en Inglés | MEDLINE | ID: mdl-31780184

RESUMEN

The Schizophrenia International Research Society (SIRS) recently held its first North American congress, which took place in Orlando, Florida from 10-14 April 2019. The overall theme of this year's congress was United in Progress - with the aim of cultivating a collaborative effort towards advancing the field of schizophrenia research. Student travel awardees provided reports of the oral sessions and concurrent symposia that took place during the congress. A collection of these reports is summarized and presented below and highlights the main themes and topics that emerged during the congress. In summary, the congress covered a broad range of topics relevant to the field of psychiatry today.


Asunto(s)
Esquizofrenia , Congresos como Asunto , Florida , Humanos , Sociedades Médicas
17.
Neuropsychopharmacology ; 44(3): 572-580, 2019 02.
Artículo en Inglés | MEDLINE | ID: mdl-30267014

RESUMEN

Aripiprazole is an antipsychotic drug characterized by partial agonist activity at D2 receptors to normalize both hyperdopaminergic and hypodopaminergic states. Traditional D2 antagonist antipsychotic drugs have been shown previously to reduce dopamine neuron activity through action on D2 autoreceptors to produce an overexcitation-induced cessation of cell firing, referred to as depolarization block. It is unclear whether aripiprazole reduces dopamine neuron activity via inhibition or, as seen following D2 antagonist administration, depolarization block. The impact of acute and repeated aripiprazole treatment was examined in the methylazoxymethanol acetate (MAM) rodent model to observe its effects on a hyperdopaminergic system, compared to normal rats. We found that administration of aripiprazole acutely or after 1 or 7 days of withdrawal from 21-day repeated treatment led to a decrease in the number of spontaneously active dopamine neurons in MAM rats but not in controls. This reduction was not reversed by apomorphine (100-200 µg/kg i.p. or 20 µg/kg i.v.) administration, suggesting that it was not due to depolarization block. In contrast, 1 h after induction of depolarization block of dopamine neurons by acute haloperidol treatment (0.6 mg/kg i.p.), aripiprazole (1 mg/kg, i.p.) reversed the depolarization block state. Therefore, aripiprazole rapidly reduced the hyperdopaminergic activity selectively in MAM rats. The reduction is unlikely due to depolarization block and persists following 7-day withdrawal from repeated treatment. Aripiprazole also removes haloperidol-induced depolarization block in MAM rats, which may underlie the acute psychotic state often observed with switching to this treatment.


Asunto(s)
Aripiprazol/farmacología , Agonistas de Dopamina/farmacología , Antagonistas de Dopamina/farmacología , Neuronas Dopaminérgicas/efectos de los fármacos , Receptores de Dopamina D2/efectos de los fármacos , Área Tegmental Ventral/efectos de los fármacos , Animales , Apomorfina/farmacología , Modelos Animales de Enfermedad , Electroencefalografía , Haloperidol/farmacología , Masculino , Acetato de Metilazoximetanol/farmacología , Ratas , Ratas Sprague-Dawley
18.
J Fam Psychol ; 16(4): 391-405, 2002 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-12561284

RESUMEN

The intimate family culture for early literacy socialization was documented for a socioculturally heterogeneous sample of 66 children enrolled in pre-kindergarten through third grade at public elementary schools in a large U.S. city. Parents were interviewed about 3 types of indexes of their family's intimate culture: the child's engagement in various literacy-related activities at home, the parents' orientation towards the significance of literacy for early child development, and the family's routines of dinnertime, reading aloud, and doing homework for school. Basic reading competencies were assessed with the Woodcock-Johnson Psychoeducational Battery--Tests of Achievement, Revised (1989). Multiple regression analysis found that a significant proportion of variance in the children's literacy development was predicted by each of the quantitative indexes of intimate family culture, leaving little or no additional variance that was due to family income or ethnicity.


Asunto(s)
Cultura , Escolaridad , Familia/psicología , Socialización , Niño , Preescolar , Femenino , Humanos , Masculino
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