922 resultados para Sono-vigília


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Mode of access: Internet.

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Ordinationi del capitolo generale: celebrato nell' anno MDCXXXI ..., 210 p., con port. y sign. propias -- S. D. N. D. Vrbani divina providentia Papae VIII. Caeremoniale ..., 12 p., con port. y sign. propias -- Ceremoniale della Santita' Di N. S. Vrbano Papa ottavo ..., 32 p., con port. y sign. propia -- Privilegi della sacra religione di San Giovanni Gerosolimitano ... , 116 p., con port., colofón y sign. propias.

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A avaliação e monitorização de sinais vitais é uma ferramenta fundamental utilizada na medicina, principalmente no que se relaciona com o estado físico do indivíduo. A evolução constante da tecnologia assumiu um papel central na evolução de produtos ligados ao contexto médico, que atualmente assumem-se como produtos do quotidiano. Existiu também uma alteração do paradigma, ou seja, produtos anteriormente utilizados exclusivamente na medicina, agora usados em atividades diárias. A preocupação da monitorização de sinais vitais é uma temática emergente, uma vez que uma análise correta destes dados permite intervir precocemente em aspetos que melhoram a qualidade de vida do indivíduo. A prevenção tornou-se um fator essencial, visto que os utilizadores interagem com estes produtos no quotidiano. Esta necessidade leva ao aparecimento de novos produtos, que estejam ligados à atividade diária do indivíduo. É neste paradigma que a solução se apresenta, a interação do produto com o utilizador de forma discreta e menos intrusiva, oferecendo maior conforto e funcionalidade. Assim sendo, o designer deve perceber os princípios de funcionamento dos componentes que permitem recolher informação sobre os sinais vitais e ambientais. O papel do design neste projeto de investigação passou pelo desenvolvimento de uma solução para monitorização da dinâmica corporal no período do sono, de forma a contribuir para a prevenção da apneia do sono. A solução divide-se em três elementos, que interligados, proporcionam ao utilizador um controlo do período de sono. Os elementos são: tapete de mapeamento de pressão, um monitor de sono, e uma aplicação móvel. Os aspetos ergonómicos e funcionais foram tidos em conta na conceção do produto assim como a aplicação de métodos de desenvolvimento de produto, com o intuito de obter uma solução que respeite as necessidades do utilizador. A solução foi validada, do ponto de vista conceptual, através de um protótipo semi-funcional.

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Theta rhythm consists of an electrophysiological hippocampal oscillation present in mammalian species (4-12 Hz with variations across species). This oscillation is present during active waking and is also prevalent in local field potentials (LFP) during rapid eye movement sleep (REM sleep). Several studies have shown that theta rhythm is important in cognitive tasks and that the medial septum is a key region for its occurrence. The septum sends cholinergic, GABAergic and glutamatergic projections to the hippocampus, which in turn projects axons to the septum. Besides the septum, other regions are involved in regulating theta rhythm, forming a complex network of interactions among brain areas that result in theta rhythm. Optogenetics is a recently developed method that has been widely used in various research areas. It allows us to manipulate the electrical activity of neurons through light stimulation. One of the existing techniques consists in using a viral vector to induce the neuronal expression of ion channels associated with the light-sensitive molecule rhodopsin (e.g. ChR2). Once infected, the neurons become sensitive to light of a particular wavelength. The present M. Sc. research aimed to perform luminous stimulation of the brain in anesthetized and freely behaving animals using chronically implanted electrodes and optical fibers in animals infected with a viral vector for ChR2 expression. Surgical viral injections were performed in the medial septum; histological results confirmed the expression of ChR2 by way of the presence of the eYFP reporter protein in the septum and also in hippocampal processes. Moreover, we performed acute experiments with luminous stimulation of the medial septum and LFP recordings of the septum and hippocampus of anesthetized animals. Action potentials were recorded in the septum. In these experiments we observed a significant increase in the firing rates of septal neurons during luminous stimulation (n = 300 trials). Furthermore, we found an early light-evoked response in the hippocampal LFP. Chronic experiments with luminous stimulation of the medial septum and hippocampus in freely behaving animals were also performed in combination with LFP recordings. We found that the luminous stimulation of the septum is able to induce theta rhythm in the hippocampus. Together, the results demonstrate that the luminous stimulation of the medial septum in optogenetically-modified animals causes relevant electrophysiological changes in the septum and the hippocampus.

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Hebb proposed that synapses between neurons that fire synchronously are strengthened, forming cell assemblies and phase sequences. The former, on a shorter scale, are ensembles of synchronized cells that function transiently as a closed processing system; the latter, on a larger scale, correspond to the sequential activation of cell assemblies able to represent percepts and behaviors. Nowadays, the recording of large neuronal populations allows for the detection of multiple cell assemblies. Within Hebb’s theory, the next logical step is the analysis of phase sequences. Here we detected phase sequences as consecutive assembly activation patterns, and then analyzed their graph attributes in relation to behavior. We investigated action potentials recorded from the adult rat hippocampus and neocortex before, during and after novel object exploration (experimental periods). Within assembly graphs, each assembly corresponded to a node, and each edge corresponded to the temporal sequence of consecutive node activations. The sum of all assembly activations was proportional to firing rates, but the activity of individual assemblies was not. Assembly repertoire was stable across experimental periods, suggesting that novel experience does not create new assemblies in the adult rat. Assembly graph attributes, on the other hand, varied significantly across behavioral states and experimental periods, and were separable enough to correctly classify experimental periods (Naïve Bayes classifier; maximum AUROCs ranging from 0.55 to 0.99) and behavioral states (waking, slow wave sleep, and rapid eye movement sleep; maximum AUROCs ranging from 0.64 to 0.98). Our findings agree with Hebb’s view that neuronal assemblies correspond to primitive building blocks of representation, nearly unchanged in 10 the adult, while phase sequences are labile across behavioral states and change after novel experience. The results are compatible with a role for phase sequences in behavior and cognition

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Academic demands, new social context, new routines and decrease of the parental control, are factors that may influence the sleep pattern of freshman students at the University. Medical students from the Federal University of Rio Grande do Norte (UFRN) have a full-time course, subjects with high-level content, and, at the first semester, classes begin at 7 a.m. This group composed by young adults who still suffering with delayed sleep phase, common in adolescence, indicating that this class schedule can be inappropriate at this age. The reduction of nocturnal sleep during school days, and the attempt to recover sleep on free days – social jet lag (JLS), suggests that in the first semester, students suffer from high sleep pressure. High sleep pressure may reflect on cognitive tasks and performance. Therefore, the aim of this study was to investigate the relationship between sleep pressure and the academic profile of medical students from the first semester of UFRN, characterizing this population socio-demographically and investigating possible impacts on therestactivity rhytm and academic performance. A sample of 88 students, healthy men and women awswered the following questionnaires: Pittsburgh Sleep Quality (PSQI), Epworth Sleepiness Scale (ESS), Horne & Ostberg Chronotype (HO), Munich Chronotype (MCTQ) and “Health and Sleep” adapted. Actigraphy was used during 14 days to make actogramas and obtain non-parametric variables of the rest-activity rhythm and the grades of the morning schedule were used as academic performance. The JLS was used as a measure of sleep pressure. Statistics significance level was 95%. The population was sociodemographic homogeneous. Most students have healthy lifestyle, practice physical activity, use car to go to the university and take between 15 and 30 minutes for this route. Regarding CSV, most were classify as intermediate (38.6%) and evening (32%) chronotypes, needs to nap during the week, suffer daytime sleepiness and have poor sleep quality. 83% of the sample has at least 1h JLS, which led us to divide into two groups: Group <2h JLS (N = 44) and Group ≥ 2h JLS (N = 44). The groups have differences only in chronotype, showing that most evening individuals have more JLS, however, no differences were found in relation to sociodemographic aspect, rest-activity rhythm or academic performance. The homogeneity of the sample was limited to compare the groups, however, is alarming that students already present in the first half: JLG, poor sleep quality and excessive daytime sleepiness, which can be accentuated through the university years, with the emergence of night shifts and increased academic demand. Interventionsaddressingthe importance of good sleep habits and the change of the class start time are strategies aimed to improve student’s health.

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The increased incidence along to new therapies for the treatment of HIV/AIDS bring way up exercise as a treatment option, as this promotes relevant changes in the general functioning of the body. The objective of this study was to evaluate in different periods the influence of exercise on quality of life and quality of sleep people living with HIV/AIDS, Natal/RN. The sample consisted of 17 people living with HIV/AIDS participating in physical exercise program, along accompanied by 25 months during the period January 2013 to April 2015. We evaluated through specific instruments quality of life, sleep quality and immunological parameters, which were evaluated before starting the exercise program and reassessed during periods of 2-4 months (short), 5-17 months (average period or intermediate) and finally to 19-25 months (long period). The results showed significant differences in five of the nine areas of quality life, pointing positive behaviors, specifically in the areas overall function, life satisfaction, health concerns, concerns about the medication and acceptance to HIV. We conclude that physical exercise promoted benefits both in short and long term, especially for the areas of quality of life of people living with HIV/AIDS and also demonstrated positive behavior changes and to aspects of sleep quality.

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Learning and memory are important mechanism for species, since its allows to recognize conspecifics, routes and food place. Sleep is one of behaviors known by facilitate learning, it is a widespread phenomenon, present in most of vertebrates lives and highly investigated in many aspects. It is known that sleep deprivation modifies physiologic behavioral processes in animals, however, sleep function in organism is still debatable. Hypothesis range from energy conservation to memory consolidation, with different roles in animal’s evolution. The zebrafish (Danio rerio) emerg e in the last years as vertebrate model in genetics and developmental biology and quickly become popular in behavioral studies, as learning and memory. Despite the fact that zebrafish is a diurnal animal and have well characterized sleep behavior, zebrafish fish still has advantages due to its small size and low cost of maintenance, whichestablishes this species as interesting model for research on sleep. In this study we aimed to analyze the effects of partial and total sleep deprivation on learning acquisition, as well the concomitant administration of alcohol and melatonin. For this, the research was divided in three phases, each one with a different kind of conditioning: (1) object Recognition, (2) avoidance conditioning and (3) appetitive conditioning. The results showed the fish partially sleep deprived and totally sleep deprived + et hanol could perform the tasks just like the control group, however, fish totally sleep deprived and totally sleep deprived + melatonin showed impairments in attention and memory during the tests. Our results suggest that only one night of sleep deprivation is enough to harm the zebrafish performance in cognitive tasks. In addition, ethanol exposure on the night previously the test seems to suppress the negative effects of sleep deprivation, while the melatonin treatment seems not to be enough to promote sleep state, at least on the protocol applied here.

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Learning and memory are important mechanism for species, since its allows to recognize conspecifics, routes and food place. Sleep is one of behaviors known by facilitate learning, it is a widespread phenomenon, present in most of vertebrates lives and highly investigated in many aspects. It is known that sleep deprivation modifies physiologic behavioral processes in animals, however, sleep function in organism is still debatable. Hypothesis range from energy conservation to memory consolidation, with different roles in animal’s evolution. The zebrafish (Danio rerio) emerg e in the last years as vertebrate model in genetics and developmental biology and quickly become popular in behavioral studies, as learning and memory. Despite the fact that zebrafish is a diurnal animal and have well characterized sleep behavior, zebrafish fish still has advantages due to its small size and low cost of maintenance, whichestablishes this species as interesting model for research on sleep. In this study we aimed to analyze the effects of partial and total sleep deprivation on learning acquisition, as well the concomitant administration of alcohol and melatonin. For this, the research was divided in three phases, each one with a different kind of conditioning: (1) object Recognition, (2) avoidance conditioning and (3) appetitive conditioning. The results showed the fish partially sleep deprived and totally sleep deprived + et hanol could perform the tasks just like the control group, however, fish totally sleep deprived and totally sleep deprived + melatonin showed impairments in attention and memory during the tests. Our results suggest that only one night of sleep deprivation is enough to harm the zebrafish performance in cognitive tasks. In addition, ethanol exposure on the night previously the test seems to suppress the negative effects of sleep deprivation, while the melatonin treatment seems not to be enough to promote sleep state, at least on the protocol applied here.

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Objective: To evaluate the inter-relationship between TMD (temporomandibular disorder), depression and sleep disorder. Methods: This is a case-control study with questionnaires in 111 patients, allocated from the Dentistry Department of UFRN, Natal, Brazil, from September 2014 to June 2015, for evaluation of depressive symptoms through the BDI (Beck Depression Inventory); sleep disorder, the PSQI (Pittsburgh Sleep Quality Index) and DTM through the RDC / TMD (diagnostic criteria to search for DTM). All indexes were applied by a single examiner previously trained and calibrated. The collected data were analyzed with chi-square tests of Pearson (χ2) and the unconditional logistic regression. Results: women had a risk of 2.85 times more likely to develop TMD (p = 0.046). The OR (odds ratio) shows that sleep disturbance increases by 2.19 the chances of having TMD (p = 0.062) and depressive symptoms increase the risk by 3.16 times in developing dysfunction (p = 0.053). Conclusion: The data of this research allows us to conclude that patients with TMD, in this population, were more likely to develop changes in sleep and depressive symptoms.

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Introdução: Existem caraterísticas miofuncionais orofaciais inerentes à Síndrome da Apneia Obstrutiva do Sono (SAOS), doença gradualmente mais prevalente no decorrer do envelhecimento. É essencial um instrumento para avaliação pormenorizada destas caraterísticas. Objetivos: Realizar a adaptação para o Português Europeu do Protocolo de Avaliação Miofuncional Orofacial MBGR - adaptado para AOS e Ronco; Realizar a validação cultural da adaptação realizada; Identificar as caraterísticas miofuncionais orofaciais de um grupo de indivíduos com SAOS. Metodologias: A adaptação do protocolo referido para o Português Europeu e respetiva validação cultural, foi realizada por peritas em Motricidade Orofacial (MO) e por peritas em Língua Portuguesa tendo o mesmo sido aplicado a 16 indivíduos com SAOS. Resultados: Após a primeira fase da adaptação para o Português Europeu do Protocolo, durante a validação cultural realizada por peritas em MO através de um “Focus Group” houve necessidade de proceder a alterações. Na aplicação aos indivíduos verificou-se que 15 são do sexo masculino. 100% da amostra de indivíduos com SAOS apresentou alterações na postura em repouso da língua e alterações relativas à sua altura e largura, bem como aumento do comprimento do palato e úvula, com alterações significativas nas funções que recrutam a sua contração isométrica. Conclusões: Existem caraterísticas miofuncionais orofaciais prevalentes na SAOS, como a hipotonia e hipofunção da musculatura da língua, palato mole, úvula, lábios e bochechas. O Terapeuta da Fala deve efetuar a avaliação padronizada destas caraterísticas para realizar uma intervenção que vise modificá-las.

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Parece existir uma associação entre solidão e uma pobre qualidade subjetiva do sono. Em reforço desta ideia, alguns estudos mostraram que os sentimentos de solidão se associam a uma menor satisfação do sono, mesmo que a sua duração não esteja diminuída. Outros mostraram que a solidão se associa a sintomas depressivos. Sabe-se que na institucionalização são frequentes os problemas de sono, depressão e solidão. No entanto, falta saber o que se passa nas respostas sociais portuguesas. Assim foram os nossos principais objetivos descrever a qualidade subjetiva do sono e analisar a intensidade dos sintomas depressivos e dos sintomas de solidão em idosos institucionalizados, comparar com uma subamostra de idosos não institucionalizados e analisar a relação entre estas variáveis nas duas subamostras. Cento e quarenta idosos, com 70 institucionalizados e 70 não institucionalizados foram emparelhados por idade, sexo, escolaridade, estado civil e sem défice cognitivo. A média de idades foi de 76,58 (DP = 6,10), sendo 104 mulheres e 36 homens. Como instrumentos para a análise utilizámos um Questionário Sociodemográfico, o Questionário sobre o Sono na Terceira Idade, o Inventário de Depressão Geriátrica e a Escala de Solidão da Universidade da Califórnia, Los Angeles. Verificou-se que os idosos institucionalizados apresentavam mais sentimentos de solidão do que os não institucionalizados. Contudo, não se verificaram diferenças entre as duas subamostras em relação aos sintomas depressivos e à qualidade subjetiva do sono. Através de uma análise correlacional verificou-se nas duas subamostras que quanto pior a qualidade subjetiva do sono mais sintomas depressivos se observavam e quanto mais sintomas depressivos, mais sentimentos de solidão. Concluímos que não houve diferenças na qualidade subjetiva do sono pelo tipo de resposta social ainda que haja mais sintomas depressivos e sintomas de solidão nos idosos institucionalizados. Não encontrámos também relação entre o sono e a solidão nos idosos institucionalizados. / There seems to be an association between loneliness and poor subjective sleep quality. In support of this idea, some studies have shown that feelings of loneliness are associated with less satisfaction sleep, even if your life is not diminished. Others have shown that loneliness is associated with depressive symptoms. It is known that in the institutionalization are frequent problems with sleeping, depression and loneliness. However, lack know what is happening in the Portuguese social responses. So were our main objectives describe the subjective quality of sleep and analyze the intensity of depressive symptoms and loneliness symptoms in institutionalized elderly, compared with a non-institutionalized elderly subsample and analyze the relationship between these variables in both subsamples. One hundred and forty older adults, with 70 institutionalized and 70 non-institutionalized were matched by age, sex, education, marital status and without cognitive impairment. The average age was 76.58 (SD = 6.10), including 104 women and 36 men. As tools for the analysis we used a sociodemographic questionnaire, the Questionnaire About Sleep in the Older Adults, Geriatric Depression Inventory and the Loneliness Scale of the University of California, Los Angeles. It was found that the institutionalized older adults had more feelings of loneliness than noninstitutionalized. However, there were no differences between the two subsamples in relation to depressive symptoms and subjective sleep quality. Through a correlational analysis it was found in the two subsamples that the worse the subjective sleep quality more depressive symptoms were observed and the more depressive symptoms, more feelings of loneliness. We concluded that there no differences in subjective sleep quality by the type of social response even though there are more depressive symptoms and symptoms of loneliness in the elderly. Also we did not find relationship between sleep and loneliness in the elderly.