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Investigating the associations between upper limb motor function and cognitive impairment: a scoping review
Kaylee D Rudd1, Katherine Lawler1,2, Michele L Callisaya3,4
1Wicking Dementia Research and Education Centre, University of Tasmania, Hobart, Tasmania, Australia.
Geroscience
|June 19, 2023
Summary
Upper limb motor function assessments, like finger tapping, can help identify cognitive impairment. Slower movements and more errors in these tasks are linked to cognitive decline, suggesting their potential as biomarkers.
Area of Science:
- Neurology
- Gerontology
- Biomarkers
Background:
- Upper limb motor function shows potential as a biomarker for cognitive impairment.
- Distinguishing cognitive impairment from healthy aging is crucial.
- Standardized assessment methods for upper limb function in cognitive impairment are lacking.
Purpose of the Study:
- To review methods used to assess upper limb motor function in adults.
- To synthesize evidence on the association between upper limb function and cognitive impairment.
- To identify research gaps and guide future research protocols.
Main Methods:
- A scoping review of literature from PubMed, CINAHL, and Web of Science.
- Systematic search using keywords for 'upper limb', 'motor function', and 'cognitive impairment'.
- Narrative synthesis of data from 60 included studies (1998-2022, 41,800 participants).
Main Results:
- Common assessments included finger tapping, Purdue Pegboard Test, and functional tasks (e.g., writing).
- Protocols varied significantly in equipment and duration.
- Slower speed, increased errors, and greater movement variability in upper limb tasks correlated with cognitive impairment, particularly Alzheimer's Disease.
Conclusions:
- Upper limb motor function assessments are diverse but show potential for identifying cognitive impairment.
- Evidence suggests motor deficits are associated with cognitive decline.
- Further research is needed to standardize protocols and validate upper limb function as a biomarker.
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