TY - JOUR
T1 - Changes in movement final position associated with agonist and antagonist muscle fatigue
AU - Jaric, Slobodan
AU - Blesic, Suzana
AU - Milanovic, Sladjan
AU - Radovanovic, Sasa
AU - Ljubisavljevic, Milos
AU - Anastasijevic, Radmila
N1 - Funding Information:
Acknowledgements The authors wish to thank Dr. Mark L. Latash for valuable criticism as well as Mr. D. Mirkov for assistance in data processing. This work was supported by a grant from the Serbian Ministry for Science and Technology.
PY - 1999/10
Y1 - 1999/10
N2 - We have tested the hypothesis that agonist and antagonist muscle fatigue could affect the final position of rapid, discrete movements. Six subjects performed consecutive elbow flexion and extension movements between two targets, with their eyes closed prior to, and after fatiguing the elbow extensor muscles. The results demonstrate that elbow extension movements performed in the post-test period systematically undershot the final position as compared to pre-test movements. However, attainment of the aimed final position in elbow flexion movements was unaffected by fatiguing of the extensor muscles. Undershoot of the final position obtained in extension movements was associated with agonist muscle fatigue, a result that was expected from the point of view of current motor control theories, and that could be explained by a reduced ability of the shortening muscle to exert force. On the other hand, the absence of the expected overshoot of the final position when the antagonist is fatigued, indicates the involvement of various reflex and/or central mechanisms operating around the stretched muscle that could contribute to returning the limb to the standard final position after a brief prominent overshoot.
AB - We have tested the hypothesis that agonist and antagonist muscle fatigue could affect the final position of rapid, discrete movements. Six subjects performed consecutive elbow flexion and extension movements between two targets, with their eyes closed prior to, and after fatiguing the elbow extensor muscles. The results demonstrate that elbow extension movements performed in the post-test period systematically undershot the final position as compared to pre-test movements. However, attainment of the aimed final position in elbow flexion movements was unaffected by fatiguing of the extensor muscles. Undershoot of the final position obtained in extension movements was associated with agonist muscle fatigue, a result that was expected from the point of view of current motor control theories, and that could be explained by a reduced ability of the shortening muscle to exert force. On the other hand, the absence of the expected overshoot of the final position when the antagonist is fatigued, indicates the involvement of various reflex and/or central mechanisms operating around the stretched muscle that could contribute to returning the limb to the standard final position after a brief prominent overshoot.
KW - Fatigue
KW - Human
KW - Movement
KW - Muscle
KW - Position
UR - http://www.scopus.com/inward/record.url?scp=0032848139&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0032848139&partnerID=8YFLogxK
U2 - 10.1007/s004210050619
DO - 10.1007/s004210050619
M3 - Article
C2 - 10502081
AN - SCOPUS:0032848139
SN - 0301-5548
VL - 80
SP - 467
EP - 471
JO - European Journal of Applied Physiology and Occupational Physiology
JF - European Journal of Applied Physiology and Occupational Physiology
IS - 5
ER -