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Accuracy of dynamic isometric force production: the influence of age and bimanual activation patterns

Accuracy of dynamic isometric force production: the influence of age and bimanual activation patterns
Accuracy of dynamic isometric force production: the influence of age and bimanual activation patterns
The purpose of this study was to investigate how children and adults control bimanual activities with the influence of kinematic variables minimized. Force and timing measures were analyzed in self-paced, isometric bimanual pinch tasks performed by 6-, 8-, 10-, 12-year-old, and adult subjects. Subjects (n = 84) performed four tasks (inphase symmetrical, antiphase reciprocal, inphase asymmetrical force-right high, inphase asymmetrical force-left high) cycling between low levels (10--30%) of maximal volitional force during three 15-s trials. Bimanual tasks requiring similar activation between the hands were performed more accurately, more quickly, and with less force and timing variability than tasks requiring different actions and/or levels of force to be produced simultaneously. Evidence of force entrainment between the hands was exhibited when force direction (increasing vs. decreasing) was similar between hands but greater relative force was required of the left hand. Lower accuracy and greater variability resulted when controlled decrement of force was required to reach the lower force targets as opposed to the upper force targets which required subjects to increase force. Subjects in the two youngest age groups exhibited lower force accuracy and greater force and timing variability relative to older children and adults. Twelve-year-old subjects approximated adults' performance in all variables
1087-1640
232-256
Harabst, K.B.
b07d389f-f560-4b5d-a306-1cabe4688848
Lazarus, J.A.
30505f6b-5834-4bdc-bc80-c3a35f0b5b18
Whitall, J.
9ad11814-bec4-4eab-a31f-e5f499403164
Harabst, K.B.
b07d389f-f560-4b5d-a306-1cabe4688848
Lazarus, J.A.
30505f6b-5834-4bdc-bc80-c3a35f0b5b18
Whitall, J.
9ad11814-bec4-4eab-a31f-e5f499403164

Harabst, K.B., Lazarus, J.A. and Whitall, J. (2000) Accuracy of dynamic isometric force production: the influence of age and bimanual activation patterns. Motor Control, 4 (2), 232-256. (PMID:11500577)

Record type: Article

Abstract

The purpose of this study was to investigate how children and adults control bimanual activities with the influence of kinematic variables minimized. Force and timing measures were analyzed in self-paced, isometric bimanual pinch tasks performed by 6-, 8-, 10-, 12-year-old, and adult subjects. Subjects (n = 84) performed four tasks (inphase symmetrical, antiphase reciprocal, inphase asymmetrical force-right high, inphase asymmetrical force-left high) cycling between low levels (10--30%) of maximal volitional force during three 15-s trials. Bimanual tasks requiring similar activation between the hands were performed more accurately, more quickly, and with less force and timing variability than tasks requiring different actions and/or levels of force to be produced simultaneously. Evidence of force entrainment between the hands was exhibited when force direction (increasing vs. decreasing) was similar between hands but greater relative force was required of the left hand. Lower accuracy and greater variability resulted when controlled decrement of force was required to reach the lower force targets as opposed to the upper force targets which required subjects to increase force. Subjects in the two youngest age groups exhibited lower force accuracy and greater force and timing variability relative to older children and adults. Twelve-year-old subjects approximated adults' performance in all variables

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Published date: April 2000
Organisations: Faculty of Health Sciences

Identifiers

Local EPrints ID: 361309
URI: http://eprints.soton.ac.uk/id/eprint/361309
ISSN: 1087-1640
PURE UUID: e6c8a1bc-4260-4c60-af70-dc1756ea1cbd

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Date deposited: 17 Jan 2014 10:01
Last modified: 16 Jul 2019 21:14

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