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Circadian rhythms, metabolism, and nutrition support in critically ill adult patients: a narrative review.
Curr Opin Clin Nutr Metab Care
December 2024
Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital.
Purpose Of Review: The human circadian system regulates several physiological processes, including metabolism, which becomes significantly disrupted during critical illness. The common use of 24-h continuous nutrition support feeding in the intensive care unit (ICU) may further exacerbate these disruptions; this review evaluates recent evidence comparing continuous and intermittent feeding schedules in critically ill adults.
Recent Findings: Research comparing different feeding schedules in critically ill adults remains limited.
Biomarkers.
Alzheimers Dement
December 2024
Seoul National University Bundang Hospital, Seongnam, Korea, Republic of (South).
Background: Brain volume is influenced by several factors that can change throughout the day. In addition, most of these factors are influenced by sleep quality. This study investigated diurnal variation in brain volume and its relation to overnight sleep quality.
View Article and Find Full Text PDFBackground: Circadian function, characterized by circadian strength, timing, and fragmentation, has been shown to correlate with cognitive function; however, little is known about in these associations, particularly among older adults who may have more variability in their sleep-wake schedules.
Method: Among 60 community-living adults aged 60-90 years with self-reported sleep complaints ≥once/ week, we investigated gender differences in the associations between circadian and cognitive function. Participants completed seven days of actigraphy and one night of polysomnography.
Biomarkers.
Alzheimers Dement
December 2024
Sorbonne University, GRC n°21, Alzheimer Precision Medicine (APM), AP-HP, Pitié-Salpêtrière Hospital, Boulevard de L'hôpital, F-75013, Paris, France.
Background: Neuropsychiatric symptoms (NPS), including depression and circadian rhythm disruptions, are early non-cognitive markers along the Alzheimer's Disease (AD) continuum. These pathological states are thought to resemble AD pathogenesis, both of which are characterized by a marked decline in adult hippocampal neurogenesis.
Method: 96 elderly participants divided into three groups based on the global depression scale, neuropsychiatric inventory, clinical dementia rating, and mini-mental status examination.
Background: People living with dementia (PWD) often have inactivity-induced muscle atrophy, increased sedentary behavior, and circadian rhythm disorders. Exercise may improve physical activity, sedentary behavior, and sleep in PWD, but further research is needed. The purpose of this pilot randomized controlled trial (RCT) was to examine whether a structured exercise program improves physical activity, sedentary behavior, and sleep in PWD.
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