Large index-fingertip forces are produced by subject-independent patterns of muscle excitation

Are fingertip forces produced by subject-independent patterns of muscle excitation? If so, understanding the mechanical basis underlying these muscle coordination strategies would greatly assist surgeons in evaluating options for restoring grasping. With the finger in neutral ad- abduction and flexe...

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Bibliographic Details
Published in:Journal of biomechanics 1998-08, Vol.31 (8), p.693-703
Main Authors: Valero-Cuevas, Francisco J, Zajac, Felix E, Burgar, Charles G
Format: Article
Language:English
Subjects:
Adult
Analysis of Variance
Biomechanical model
Computer Simulation
Electromyography
EMG
Finger
Finger Joint - physiology
Fingers - physiology
Forecasting
Grasping
Hand
Hand - physiology
Hand Strength - physiology
Humans
Isometric Contraction - physiology
Maximum voluntary contraction
Metacarpophalangeal Joint - physiology
Models, Biological
Motor Skills - physiology
Muscle Contraction - physiology
Muscle coordination
Muscle, Skeletal - physiology
Stress, Mechanical
Tendons - physiology
Torque
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Summary:Are fingertip forces produced by subject-independent patterns of muscle excitation? If so, understanding the mechanical basis underlying these muscle coordination strategies would greatly assist surgeons in evaluating options for restoring grasping. With the finger in neutral ad- abduction and flexed 45° at the MCP and PIP, and 10° at DIP joints, eight subjects attempted to produce maximal voluntary forces in four orthogonal directions perpendicular to the distal phalanx (palmar, dorsal, lateral and medial) and in one direction collinear with it (distal). Forces were directed within 4.7±2.2° (mean±S.D.) of target and their magnitudes clustered into three distinct levels ( p
ISSN:0021-9290
1873-2380
DOI:10.1016/S0021-9290(98)00082-7