922 resultados para Sono-vigília


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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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The objective of the present study was to compare parameters such as total time, number of episodes and mean duration of episodes of each wake-sleep cycle stage, and sequences of stages in electroencephalographic records scored in 10 and 30 seconds epochs in controls and sleep deprived animals, submitted to avoiding tasks of learning and memory. This comparing tried to discuss the need of lesser epochs in the EEG scoring, and of the search for more details and shorter sequences, present in many studies nowadays

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Apesar de inúmeros estudos e pesquisas relatarem os benefícios da atividade física na qualidade do sono, pode-se observar que quando tratamos do esporte, principalmente o esporte de alto rendimento, seus praticantes nem sempre apresentam a mesma qualidade. Aspectos como estresse, medo, excesso de cargas de treinamento e, principalmente, a ansiedade podem alterar os padrões do ciclo sono-vigília e diminuir a qualidade do sono, podendo provocar grandes prejuízos na performance durante provas e competições. A presença de torcida, pais ou amigos em competições ou jogos, a participação de peneiras ou o simples fato de ser ou não convocado para o jogo, até a obrigação da vitória, a pressão exercida por técnicos e patrocinadores, entre outras características do esporte de rendimento, são contribuintes da aparição do sentimento ansioso. Alguns autores discutem a possibilidade de que esse sentimento apresenta-se com graus diferenciados entre atletas de modalidades individuais e coletivas. Nos esportes individuais, os atletas não compartilham responsabilidades, expondo-se sozinhos a uma avaliação direta dos expectadores, gerando uma pressão desproporcional à demonstração de excelência na performance. A partir disso, o objetivo deste estudo foi investigar a presença de alterações no sono de atletas, considerando a modalidade em que estão inseridos (individual ou coletiva) e suas possíveis diferenças. A pesquisa compreendeu um estudo de campo em adotamos os procedimentos das pesquisas qualitativas. Foi utilizado um questionário avaliando a percepção subjetiva da qualidade do sono de atletas das modalidades: handebol masculino, atletismo masculino, voleibol feminino e ginástica artística feminina. Os resultados encontrados levam à especulação de que existem alterações na qualidade do sono dos atletas principalmente nas noites que antecedem competições ...(Resumo completo, clicar acesso eletrônico abaixo)

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Biological rhythms are part of the life from the simplest to the most complex living beings. In humans, one of the most important biological rhythms is the sleep-wake cycle (SWC), which represents an indispensable behavior for health, since sleep deprivation can lead to deficits in attention and memory, mood and daytime sleepiness which may affect school performance. Nevertheless, the SWC is a content rarely discussed in schools. Thus, the aim of this research was to address contents of the sleep-wake cycle, related to the content of Health to encourage healthy sleep habits. This study was conducted in a public school with 33 students of the 3rd year of high school and is divided into four stages: 1st) Study and analysis of the content of the textbook adopted by the school to subsidize the activities covered in the teaching unit (TU) and approximation with the biology teacher from the class to evaluated the feasibility of schedules for the development of TU; 2nd) Survey of students' prior knowledge, through a questionnaire, to guide the development of the TU; 3rd) Development and implementation of a TU based on meaningful learning and characterization of the students sleep habits, 4th) Evaluation of the TU as a viable proposal to teach biological rhythms concepts. Previous knowledge of students about the SWC are scarce and this content is not covered in the books adopted by the school. Alternative conceptions were observed, particularly with regard to individual differences in sleep, which may contribute to the occurrence of inadequate sleep habits, as reported by the adolescents in this study. The activities developed during UD were well received by the students who showed participative, motivated and evaluated positively the procedures used by the researcher. After the TU, students' knowledge about the concept of biological rhythms has been increased and they started to identify that the SWC changes throughout life and occur due biological and socio-cultural factors. Thus, the UD elaborated in this study represents a viable proposal to teach the concepts of biological rhythms contextualized to the content of Health, in high school

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The aging process causes changes in the elderly’s sleep/awake standard impairing their cognitive abilities, particularly executive functioning, which already suffers loss by aging. The literature suggests that executive function and preserved sleep quality are key to maintaining good quality of life and independence of older people, requiring interventions to minimize the impact of losses incurred by the aging process. This study evaluated the effect of a cognitive training program and sleep hygiene techniques for executive functions and sleep quality in healthy older people. The participants were 41 healthy older adults, of both sexes, who were randomly divided into four groups: control group [GC], cognitive training group [GTC], sleep hygiene group [GHS] and training group + hygiene [GTH]. The research was developed in three stages: 1st - initial assessment of cognition and sleep; 2nd - specific intervention to each group; 3rd - post-intervention revaluation. The results showed that GTC had significant improvements in cognitive tasks flexibility, planning, verbal fluency and some aspects of episodic memory, besides gains in sleep quality and decrease on daytime hypersomnolence. The GHS improved sleep quality and daytime sleepiness as well and had significant improvements in insights capacity, planning, attention and in all evaluated aspects of episodic memory. The GTH had significant gains in cognitive flexibility, problem solving, verbal fluency, attention and episodic memory. The CG showed significant worsening in excessive daytime sleepiness in capacity planning. Thus, we conclude that cognitive training interventions and sleep hygiene strategies are useful in improving cognitive performance and quality of healthy elderly sleep.

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O estilo de vida, atualmente, tem bastante influência na higiene do sono. São diversos os fatores que contribuem tanto para a sua manutenção como para a sua falha. O trabalho por turnos está frequentemente associado a elevadas cargas de stresse e fadiga devido a situações imprevisíveis e perigosas que possam advir da área profissional, da rotatividade do horário laboral, a um sono deficiente, à falta de atividades desportivas e de lazer, bem como à má alimentação. Estilo de vida, este, que reduz a qualidade de vida em geral e aumenta drasticamente a probabilidade de surgir doenças quer ao nível físico como mental. O sono, por sua vez, é um fenómeno universal de grande importância para o desenvolvimento humano. A qualidade do sono é determinada por vários fatores, entre eles as rotinas de sono. Torna-se, assim, importante estudar as rotinas de forma a incrementar o conhecimento sobre este determinante. A alternância do dia-noite –claro/escuro -, os horários de trabalho, os horários de lazer, as atividades familiares são todos fatores exógenos que sincronizam o ciclo sono-vigília. Estudar a qualidade de sono em profissionais que trabalham por turnos é de extrema relevância visto tratar-se de uma população cada vez mais em risco e em que se considera que o sono seja um dos fatores mais comprometidos. O presente estudo tem como objetivo caraterizar e avaliar a qualidade do sono em profissionais, em função dos horários de trabalho. A metodologia utilizada é quantitativa e centrou-se na aplicação do questionário IQSP – Índice de Qualidade do Sono de Buysse et al. (1989), adaptado e traduzido para português. O questionário foi aplicado a 50 indivíduos pertencentes à Polícia Marítima, na Zona Norte de Portugal Continental, na maioria (92%) homens com idades compreendidas entre os 36 e os 55 anos. Do total de participantes, 76% (n=38) encontra-se a trabalhar por turnos. A análise dos dados foi efetuada através do Statistical Package for the Social Sciences, versão 22, tendo sido realizadas análises descritivas, inferenciais e correlacionais. Com maior relevância, no presente estudo, conclui-se que não existem diferenças estatisticamente significativas na qualidade do sono entre aqueles que trabalham por turnos e os que têm horário fixo, bem como, que a qualidade do sono também não se diferencia em função da idade, do tempo de profissão e da existência de filhos pequenos. Conclui-se, ainda, que a qualidade do sono parece estar relacionada com a satisfação com o horário de trabalho.

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O presente estudo teve por objetivo analisar os possíveis efeitos do trabalho por turnos, incluindo o turno noturno, a nível da saúde, vida familiar e social, numa empresa do sector da indústria. Foi construído um questionário que abordava questões relativas aos dados sociodemográficos, organização temporal do trabalho, qualidade do sono, exigências da tarefa e envolvimento, saúde, vida familiar e social, e posteriormente foi aplicado a uma amostra de 24 trabalhadores com idades entre os 29 e os 52 anos (41,58±5,79 anos). Os resultados mostram uma tendência para doenças como a obesidade, colesterol elevado e manifestação de sintomas relacionados com problemas digestivos nos trabalhadores que trabalham por turnos à [sic] mais anos. Antes do primeiro turno noturno o tempo de sono é bastante reduzido e fica aquém do tempo que os trabalhadores sentem que necessitam dormir para se sentirem bem. O turno da tarde é o que permite os trabalhadores ficarem com um tempo de sono mais próximo desse “ideal”. Em relação à idade, todos os trabalhadores do grupo etário mais velho manifestam interrupções do sono diurno. Também se verifica um maior descontentamento destes trabalhadores com o tempo livre para realizar atividades que tragam bem-estar. Este estudo contribui para o conhecimento da realidade do trabalho por turnos na indústria e espera-se que desperte a procura de soluções que otimizem a vida destes trabalhadores.

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Dopamine (DA) is known to regulate both sleep and memory formations, while sleep plays a critical role in the consolidation of different types of memories. We believe that pharmacological manipulation of dopaminergic pathways might disrupt the sleep-wake cycle, leading to mnemonic deficits, which can be observed in both behavioral and molecular levels. Therefore, here we investigated how systemic injections of haloperidol (0.3 mg/kg), immediately after training in dark and light periods, affects learning assessed in the novel object preference test (NOPT) in mice. We also investigated the hippocampal levels of the plasticity-related proteins Zif-268, brain-derived neurotrophic factor (BDNF) and phosphorylated Ca2+/calmodulin-dependent protein kinases II (CaMKII-P) in non-exposed (naïve), vehicle-injected controls and haloperidol-treated mice at 3, 6 and 12 hours after training in the light period. Haloperidol administration during the light period led to a subsequent impairment in the NOPT. In contrast, preference was not observed during the dark period neither in mice injected with haloperidol, nor in vehicle-injected animals. A partial increase of CaMKII-P in the hippocampal field CA3 of vehicle-injected mice was detected at 3h. Haloperidol-treated mice showed a significant decrease in the dentate gyrus of CaMKII-P levels at 3, 6 and 12h; of Zif-268 levels at 6h, and of BDNF levels at 12h after training. Since the mnemonic effects of haloperidol were only observed in the light period when animals tend to sleep, we suggest that these effects are related to REM sleep disruption after haloperidol injection

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Pós-graduação em Fonoaudiologia - FFC

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Cognitive dysfunction syndrome (CDS) is a progressive degenerative disorder of older dogs, characterized by a decline in cognitive function. The main clinical signs consistent with CDS are: disorientation, changes in socio-environmental interaction, sleep-wake cycle disturbance, changes in hygiene habits, urinate and/or defecate in unusual places, decreased physical activity, anxiety and eating disorders. There are no specific diagnostic tests for this condition in vivo, but alterations in neurological examination, cognitive tests and magnetic resonance imaging can be observed. The diagnosis is confirmed by histopathological examination of brain tissue. Diets rich in antioxidants, environmental enrichment with exercise and the use of selegiline and L-deprenyl have been recommended for the treatment of CDS.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Dopamine (DA) is known to regulate both sleep and memory formations, while sleep plays a critical role in the consolidation of different types of memories. We believe that pharmacological manipulation of dopaminergic pathways might disrupt the sleep-wake cycle, leading to mnemonic deficits, which can be observed in both behavioral and molecular levels. Therefore, here we investigated how systemic injections of haloperidol (0.3 mg/kg), immediately after training in dark and light periods, affects learning assessed in the novel object preference test (NOPT) in mice. We also investigated the hippocampal levels of the plasticity-related proteins Zif-268, brain-derived neurotrophic factor (BDNF) and phosphorylated Ca2+/calmodulin-dependent protein kinases II (CaMKII-P) in non-exposed (naïve), vehicle-injected controls and haloperidol-treated mice at 3, 6 and 12 hours after training in the light period. Haloperidol administration during the light period led to a subsequent impairment in the NOPT. In contrast, preference was not observed during the dark period neither in mice injected with haloperidol, nor in vehicle-injected animals. A partial increase of CaMKII-P in the hippocampal field CA3 of vehicle-injected mice was detected at 3h. Haloperidol-treated mice showed a significant decrease in the dentate gyrus of CaMKII-P levels at 3, 6 and 12h; of Zif-268 levels at 6h, and of BDNF levels at 12h after training. Since the mnemonic effects of haloperidol were only observed in the light period when animals tend to sleep, we suggest that these effects are related to REM sleep disruption after haloperidol injection

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In adolescents, who tend to sleep and wake-up later, the school schedule in the morning is associated with sleep advancement and shortening besides bedtime and wake-up time irregularity between week and weekend days. As a result, there is an increase in daytime sleepiness and a drop in cognitive performance that interfer in students performance in classroom. These consequences reinforce the need to evaluate alternatives that help the adolescent to adapt their sleep needs to the time of start of classes in the morning. Accordingly, the general aim of this study was to evaluate the effects of a sleep program education and sunlight exposure in early morning on sleep-wake cycle (SWC) and daytime sleepiness of adolescents. The students chronotype were evaluated by the Horne-Ostberg questionnaire and the health and usual sleep habits by "the health and the sleep questionnaire. The SWC patterns were assessed by sleep log, the daytime sleepiness by Karolinska Sleepiness Scale (KSS) and the alertness by the Psychomotor Vigilance Test (PVT). These parameters were compared before and after a sleep education program and before and during the sunlight exposure. The sleep program was effective in increasing sleep knowledge of adolescents, in promoting a reduction of bedtime and wake-up time irregularity and increasing the sleep duration in school days. The sunlight exposure effect was evaluated in the return to classes after vacation due to the difference in sleep patterns between school and vacation days. During the intervention week it was observed an advance of sleep schedules, an increase on sleep duration and alertness at the end of the morning. Assessed separately, sleep education and sunlight exposure should contribute to minimize adolescents partial sleep deprivation, but daytime sleepiness effect must be better investigated. These strategies should be used jointly by school members to improve health and performance of their students