Title

Age-related differentiation of sensorimotor control strategies during pursuit and compensatory tracking

Document Type

Conference Proceeding

Language

eng

Format of Original

4 p.

Publication Date

2014

Publisher

Institute of Electrical and Electronics Engineers

Source Publication

2014 Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)

Source ISSN

1557-170X

Original Item ID

doi: 10.1109/EMBC.2014.6944392

Abstract

Motor control deficits during aging have been well-documented. Various causes of neuromotor decline, including both peripheral and central neurological deficits, have been hypothesized. Here, we use a model of closed-loop sensorimotor control to examine the functional causes of motor control deficits during aging. We recruited 14 subjects aged 19-61 years old to participate in a study in which they performed single-joint compensatory and pursuit tracking tasks with their dominant hand. We found that visual response delay and visual noise increased with age, while reliance on visual feedback, especially during compensatory tracking decreased. Increases in visual noise were also positively correlated with increases in movement error during a reach and hold task. The results suggest an increase in noise within the visuomotor control system may contribute to the decline in motor performance during early aging.

Comments

Published as part of the proceedings of the conference, 2014 36th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2014: 3562-3565. DOI.