Such variability in terminology has discouraged consensus building, both conceptually and operationally. AI has been classified as adjustment insomnia, stress-related insomnia, transient psychophysiological insomnia, symptomatic insomnia, sub-acute insomnia, and sub-chronic insomnia. Part of the problem is multiple terms have been used to refer to AI over this time frame. Historically, acute insomnia (AI) has not been well defined or precisely delineated in the literature, despite its having been included in multiple classification systems since at least the late 1970s. Defining Acute and Chronic Insomnia (Just a Matter of Time?)Īcute Insomnia. These symptoms are what separate chronic insomnia disorder from the simple presence of insomnia symptoms (which do not have an apparent impact on daytime functioning).2. This condition is characterized by trouble falling asleep or staying asleep at least three nights a week for over three months with an impact on daytime functioning (mood, attention, and daytime concentration). “Can these cognitive deficits be reversed with sleep disorder treatment? There are many important questions that remain to be explored and that will have a major impact on the prevention and treatment of age-related cognitive disorders.”Ĭhronic insomnia is one of the most common sleep disorders. “Does chronic insomnia predispose people to cognitive decline?” asks Dang-Vu. This was the case even after accounting for other factors, be they clinical, demographic, or lifestyle characteristics, which may influence cognitive performance,” Dang-Vu says.įurther research in this area will aim to better characterize this relationship between poor sleep and cognitive problems. The main type of memory affected was declarative memory-the memory of items and events. ![]() “The individuals in the chronic insomnia group performed significantly worse on the tests compared to those from the other two groups. Link Between Chronic Insomnia and Cognitive Problems They all filled out questionnaires and underwent physical exams and a battery of neuropsychological tests to evaluate different cognitive functions and the quality of their sleep. Each participant belonged to one of three groups: (1) people with chronic insomnia disorder, (2) people with symptoms of insomnia who did not complain of any impact on their daytime functioning, and (3) people with normal sleep quality. The analysis examined data from 28,485 participants aged 45 and over who come from many cities across Canada, including Montreal. The purpose of our study was therefore to determine the precise link between chronic insomnia and cognitive function in a large sample of middle-aged and elderly people while also accounting for the possible effect of these other health issues.” Nearly 30,000 Participants Involved Chronic insomnia is often associated with other health issues (such as anxiety or chronic pain) that can also affect cognitive function, which makes it difficult to determine the direct contribution of insomnia to these cognitive problems. Other studies do not distinguish between chronic insomnia disorder and the simple presence of symptoms. ![]() “However, many of these studies were conducted on a limited number of individuals suffering from insomnia, and the results are not always consistent from study to study. “A number of studies have shown links between insomnia and cognitive problems,” says Dang-Vu in a release. ![]() Dang-Vu is also an associate professor in the department of Health, Kinesiology and Applied Physiology and the Concordia University Research Chair in Sleep, Neuroimaging and Cognitive Health and a clinical associate professor in the Department of Neuroscience at Université de Montréal. The analysis was conducted by a research team that included postdoctoral researcher Nathan Cross and his advisor Thanh Dang-Vu, both of whom are affiliated with Concordia University’s PERFORM Centre and the Centre de recherche of the Institut universitaire de gériatrie de Montréal (CRIUGM) of the CIUSSS du Centre-Sud-de-l’Île-de-Montréal. This is the primary finding from an analysis of sleep data from the pan-Canadian cohort of the Canadian Longitudinal Study on Aging published in the journal Sleep. ![]() Chronic insomnia disorder has a direct negative impact on cognitive function of people aged 45 and over, independent of the effect of other health issues.
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