DocumentCode :
140176
Title :
Age-related differentiation of sensorimotor control strategies during pursuit and compensatory tracking
Author :
Heenan, Megan ; Scheidt, Robert A. ; Beardsley, Scott A.
Author_Institution :
Biomed. Eng. Dept., Marquette Univ., Milwaukee, WI, USA
fYear :
2014
fDate :
26-30 Aug. 2014
Firstpage :
3562
Lastpage :
3565
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.
Keywords :
biomechanics; closed loop systems; delays; feedback; medical robotics; neurophysiology; noise; tracking; age 19 yr to 61 yr; age-related differentiation; central neurological deficits; closed-loop sensorimotor control model; hand movement; peripheral neurological deficits; single-joint compensatory tracking; single-joint pursuit tracking; visual feedback; visual noise; visual response delay; Aging; Delays; Elbow; Noise; Standards; Tracking; Visualization;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Engineering in Medicine and Biology Society (EMBC), 2014 36th Annual International Conference of the IEEE
Conference_Location :
Chicago, IL
ISSN :
1557-170X
Type :
conf
DOI :
10.1109/EMBC.2014.6944392
Filename :
6944392
Link To Document :
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