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The Role of Subjective Sleep Quality...

Chen, Michelle.

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The Role of Subjective Sleep Quality in Dual-Task Gait among Older Adults.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	The Role of Subjective Sleep Quality in Dual-Task Gait among Older Adults./
作者:	Chen, Michelle.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2019,
面頁冊數:	130 p.
附註:	Source: Dissertations Abstracts International, Volume: 81-08, Section: A.
Contained By:	Dissertations Abstracts International81-08A.
標題:	Physiology. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=27773263
ISBN:	9781392725061

The Role of Subjective Sleep Quality in Dual-Task Gait among Older Adults.
Chen, Michelle.

The Role of Subjective Sleep Quality in Dual-Task Gait among Older Adults. - Ann Arbor : ProQuest Dissertations & Theses, 2019 - 130 p.

Source: Dissertations Abstracts International, Volume: 81-08, Section: A.

Thesis (Ph.D.)--Yeshiva University, 2019.

This item must not be sold to any third party vendors.

Sleep complaints are common and linked to morbidity and functional decline among adults. The role of sleep in dual-task gait, an attention-demanding walking paradigm, is not well understood. Dual-task gait relies heavily on the functionality of the prefrontal cortex (PFC), which has also been implicated in age-related changes in cognition and mobility as well as sleep physiology. The current study aimed to 1) elucidate the role of subjective sleep quality in dual-task gait and 2) explore how attention and executive functioning (subserved by the PFC) mediate the associations between subjective sleep parameters and single- and dual-task gait outcomes. A sample of 388 non-demented community-dwelling older adults (mean age in years= 76 ± 6. 7) underwent three experimental conditions - normal walk, alpha (i.e., recite alternate letters of the alphabet), and walk while talk. Sleep was assessed using the Pittsburgh Sleep Quality Index (PSQI). Attention and executive functions were measured using a composite score including several neuropsychological tests: Controlled Oral Word Association Test (phonemic and semantic fluency), Trail Making Test (parts A and B), and Digit Symbol Substitution Test. Outcome measures included gait velocity, rate of correct letter generation, and PFC oxygenation levels (measured by functional near-infrared spectroscopy). Results indicated that gait velocity was sensitive to the negative impact of subjective sleep dysfunction, specifically poor sleep group status ( determined by PSQI global score of greater than five points) and shorter sleep duration (raw score of one of PSQI components), regardless of dual-task demands. The lack of differential effects between single- and dual-task conditions and discrepancy from prior literature may be due to the sleep data source (subjective inventory in this study vs. objective measurement in prior study). Sleep disturbances (raw score of one of PSQI components) was also related to reduced PFC oxygenation during both single-task and dual-task gait (not in non-gait condition alpha), which may be explained by the capacity limitations model - these individuals were unable to increase brain response to meet task demands that involved gait. Impairment in attention and executive functioning may be one of the mechanisms underlying sleep dysfunction's negative impact on walking. Most of the effects found in this study were not significant after adjusting for covariates, suggesting that age and age-related comorbidities may underlie the deleterious effects of sleep problems on gait. Implications for treatment are discussed.

ISBN: 9781392725061Subjects--Topical Terms:

518431
Physiology.
Subjects--Index Terms:

Older Adults/Aging

The Role of Subjective Sleep Quality in Dual-Task Gait among Older Adults.
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