Qu Tian1, Nathalie Chastan2,3, Madhav Thambisetty4, Susan M Resnick4, Luigi Ferrucci1, Stephanie A Studenski1. 1. Longitudinal Studies Section, National Institute on Aging, Bethesda, Maryland. 2. Department of Neurophysiology, Rouen University Hospital, Rouen, France. 3. UNICAEN, INSERM, COMETE, Normandy University, Caen, France. 4. Laboratory of Behavioral Neuroscience, National Institute on Aging, Bethesda, Maryland.
Abstract
OBJECTIVES: Given the need to detect subclinical changes in brain health that sometimes occur with aging in apparently healthy older adults, we assessed whether bimanual gesture imitation performance, simple to assess clinically, can detect age effects and alterations in cognition, olfaction, and movement. DESIGN: Cross-sectional study. SETTING: Baltimore Longitudinal Study of Aging. PARTICIPANTS: Men and women, aged 22 to 101 years, without cognitive impairment, dementia, stroke, Parkinson disease, resting tremor, abnormal muscle tone, or abnormal coordination (N = 507). MEASUREMENTS: Bimanual gesture imitation was measured using a test validated in older adults. We assessed (1) cognition, including verbal memory, executive function, attention, visuospatial ability, visuoperceptual speed, and language; (2) manual dexterity with the Purdue Pegboard Test; (3) olfaction, using the 16-item Sniffin' Sticks Identification Test; (4) upper extremity motor function, using a computer-based finger tapping test; and (5) lower extremity motor function, including 6-meter usual and rapid gait speeds, 400-meter walk time, Health ABC Physical Performance Battery, and total standing balance time. Cross-sectional associations between bimanual gesture imitation performance and each measure were examined using linear regression after adjustment for age, sex, race, education, and body mass index. Models with mobility measures also adjusted for height. RESULTS: Higher gesture imitation performance was associated with younger age. After adjustment, a worse score was associated with worse olfaction, executive function, and visuospatial ability. Gesture imitation score was not associated with other cognitive measures or motor function. CONCLUSION: In persons without clinically detectable neurological conditions, poor bimanual gesture imitation is associated with other indicators of brain health, including olfaction and selected cognitive function domains. Bimanual gesture imitation may be useful clinically to detect subtle brain changes in apparently healthy older adults. J Am Geriatr Soc 67:2581-2586, 2019.
OBJECTIVES: Given the need to detect subclinical changes in brain health that sometimes occur with aging in apparently healthy older adults, we assessed whether bimanual gesture imitation performance, simple to assess clinically, can detect age effects and alterations in cognition, olfaction, and movement. DESIGN: Cross-sectional study. SETTING: Baltimore Longitudinal Study of Aging. PARTICIPANTS: Men and women, aged 22 to 101 years, without cognitive impairment, dementia, stroke, Parkinson disease, resting tremor, abnormal muscle tone, or abnormal coordination (N = 507). MEASUREMENTS: Bimanual gesture imitation was measured using a test validated in older adults. We assessed (1) cognition, including verbal memory, executive function, attention, visuospatial ability, visuoperceptual speed, and language; (2) manual dexterity with the Purdue Pegboard Test; (3) olfaction, using the 16-item Sniffin' Sticks Identification Test; (4) upper extremity motor function, using a computer-based finger tapping test; and (5) lower extremity motor function, including 6-meter usual and rapid gait speeds, 400-meter walk time, Health ABC Physical Performance Battery, and total standing balance time. Cross-sectional associations between bimanual gesture imitation performance and each measure were examined using linear regression after adjustment for age, sex, race, education, and body mass index. Models with mobility measures also adjusted for height. RESULTS: Higher gesture imitation performance was associated with younger age. After adjustment, a worse score was associated with worse olfaction, executive function, and visuospatial ability. Gesture imitation score was not associated with other cognitive measures or motor function. CONCLUSION: In persons without clinically detectable neurological conditions, poor bimanual gesture imitation is associated with other indicators of brain health, including olfaction and selected cognitive function domains. Bimanual gesture imitation may be useful clinically to detect subtle brain changes in apparently healthy older adults. J Am Geriatr Soc 67:2581-2586, 2019.
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