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Measurement of Spatial Stability in Precision Grip

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Published on: June 4, 2020

Deficits in force production during multifinger tasks demarcate cognitive dysfunction.

Richard G Carson^1,2, Debora Berdondini³, Maebh Crosbie³

¹Trinity College Institute of Neuroscience and School of Psychology, Trinity College Dublin, Dublin 2, Ireland. richard.carson@tcd.ie.

Aging Clinical and Experimental Research

|April 5, 2024

Summary

This summary is machine-generated.

A challenging multifinger force deficit (MFFD) test, with limited sensory feedback, showed that poorer cognitive status was linked to greater force deficits. This suggests MFFD is sensitive to cognitive decline in older adults.

Keywords:

Cognition Coordination Dexterity Grip strength Physical function

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Area of Science:

Neuroscience
Gerontology
Motor Control

Background:

The multifinger force deficit (MFFD) describes reduced force per finger with increased finger involvement.
Previous research indicates MFFD is associated with cognitive status.

Purpose of the Study:

To determine if a difficult multifinger grip dynamometry task, minimizing tactile feedback and requiring reaction force compensation, yields an MFFD more sensitive to cognitive status.
Investigate the relationship between MFFD and cognitive function in older adults.

Main Methods:

Cross-sectional study of 62 community-dwelling adults aged 65-87.
Assessed motor function using a challenging multifinger grip dynamometry task.
Evaluated cognitive status via Montreal Cognitive Assessment (MoCA) and principal component analysis of 11 cognitive tests.

Main Results:

Nearly half of participants could not complete the dynamometry task; cognitive status differentiated completers from non-completers.
Among completers, MFFD was negatively correlated with MoCA scores, indicating higher cognitive function related to smaller force deficits.
Associations were also found between MFFD and latent cognitive function components.

Conclusions:

Neurodegenerative processes in aging affect both motor coordination in multifinger tasks and cognitive function due to shared neural systems.
Deficits in force production during multifinger tasks are sensitive indicators of cognitive dysfunction.