Abstract
The following issue was addressed in the present study. Can instruction modify the involvement of different muscles when mechanical conditions and characteristics of a motor task remain unchanged? Subjects (N = 9) produced force by pressing their right hands against a fixed pad and were asked, in different trials, to predominantly use muscles that control either their elbows or their wrists. Force characteristics remained the same. In some trials, the setup was unexpectedly released so that a flexion movement occurred. Instruction changes induced changes in the muscle activation patterns and in preprogrammed reactions seen in unexpectedly released trials. The authors conclude that there may be different neurophysiological solutions to a specific mechanical task and that patterns of muscle activation may reflect features of both the explicit motor task and the subject's intention that may have no obvious mechanical correlate.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 194-198 |
| Number of pages | 5 |
| Journal | Journal of motor behavior |
| Volume | 30 |
| Issue number | 3 |
| DOIs | |
| State | Published - Sep 1 1998 |
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All Science Journal Classification (ASJC) codes
- Biophysics
- Orthopedics and Sports Medicine
- Experimental and Cognitive Psychology
- Cognitive Neuroscience
Cite this
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Instruction-Dependent Muscle Activation Patterns Within a Two-Joint Synergy : Separating Mechanics From Neurophysiology. / Latash, Mark; Jaric, Slobodan.
In: Journal of motor behavior, Vol. 30, No. 3, 01.09.1998, p. 194-198.Research output: Contribution to journal › Article
TY - JOUR
T1 - Instruction-Dependent Muscle Activation Patterns Within a Two-Joint Synergy
T2 - Separating Mechanics From Neurophysiology
AU - Latash, Mark
AU - Jaric, Slobodan
PY - 1998/9/1
Y1 - 1998/9/1
N2 - The following issue was addressed in the present study. Can instruction modify the involvement of different muscles when mechanical conditions and characteristics of a motor task remain unchanged? Subjects (N = 9) produced force by pressing their right hands against a fixed pad and were asked, in different trials, to predominantly use muscles that control either their elbows or their wrists. Force characteristics remained the same. In some trials, the setup was unexpectedly released so that a flexion movement occurred. Instruction changes induced changes in the muscle activation patterns and in preprogrammed reactions seen in unexpectedly released trials. The authors conclude that there may be different neurophysiological solutions to a specific mechanical task and that patterns of muscle activation may reflect features of both the explicit motor task and the subject's intention that may have no obvious mechanical correlate.
AB - The following issue was addressed in the present study. Can instruction modify the involvement of different muscles when mechanical conditions and characteristics of a motor task remain unchanged? Subjects (N = 9) produced force by pressing their right hands against a fixed pad and were asked, in different trials, to predominantly use muscles that control either their elbows or their wrists. Force characteristics remained the same. In some trials, the setup was unexpectedly released so that a flexion movement occurred. Instruction changes induced changes in the muscle activation patterns and in preprogrammed reactions seen in unexpectedly released trials. The authors conclude that there may be different neurophysiological solutions to a specific mechanical task and that patterns of muscle activation may reflect features of both the explicit motor task and the subject's intention that may have no obvious mechanical correlate.
UR - http://www.scopus.com/inward/record.url?scp=0031717122&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0031717122&partnerID=8YFLogxK
U2 - 10.1080/00222899809601336
DO - 10.1080/00222899809601336
M3 - Article
C2 - 20037078
AN - SCOPUS:0031717122
VL - 30
SP - 194
EP - 198
JO - Journal of Motor Behavior
JF - Journal of Motor Behavior
SN - 0022-2895
IS - 3
ER -