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Published on: February 14, 2014
Cognitive status and physical function in older african americans
Maria L Nieto1, Steven M Albert, Lisa A Morrow
1Department of Medicine, University of Pittsburgh, Pennsylvania, USA.
Journal of the American Geriatrics Society
|September 25, 2008
Summary
Executive function and global memory significantly predict lower extremity function in older African Americans. Poor executive function strongly correlates with reduced physical performance, highlighting the link between cognitive health and mobility.
Area of Science:
- Gerontology and Cognitive Neuroscience
- Public Health and Aging Research
Background:
- Understanding factors influencing lower extremity function is crucial for maintaining independence in aging populations.
- Cognitive decline, particularly in executive function, may impact physical performance in older adults.
Purpose of the Study:
- To examine the association between global cognition, specific cognitive domains, and lower extremity function.
- To identify key cognitive predictors of physical performance in community-dwelling elderly African Americans.
Main Methods:
- Cross-sectional study involving 96 African American participants aged 60+.
- Assessed physical performance using the Short Physical Performance Battery (SPPB).
- Evaluated global cognition (Mini-Mental State Examination) and memory (Bushke Memory Impairment Screen), alongside domain-specific cognition (attention, verbal memory, executive function) using the Computer-based Assessment of Mild Cognitive Impairment.
Main Results:
- Executive function and global memory (MIS) were significant predictors of lower extremity function.
- Poor executive function was associated with a >4-fold increased likelihood of poorer lower extremity function (OR=4.96).
- Attention and executive function domains were better predictors than verbal memory.
Conclusions:
- Global memory and executive function are key cognitive determinants of lower extremity function in older African Americans.
- Impaired lower extremity function may be linked to deficits in higher-level executive control processes.
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