Grasp-Based Functional Coupling Between Reach- and Grasp-Related Components of Forelimb Muscle Activity. 

 -  2017 
<br/><br/> How are appropriate combinations of forelimb muscles selected during reach-to-grasp movements in the presence of neuromotor redundancy and important task-related constraints? The authors tested whether grasp type or target location preferentially influence the selection and synergistic coupling between forelimb muscles during reach-to-grasp movements. Factor analysis applied to 14-20 forelimb electromyograms recorded from monkeys performing reach-to-grasp tasks revealed 4-6 muscle components that showed transport/preshape- or grasp-related features. Weighting coefficients of transport/preshape-related components demonstrated strongest similarities for reaches that shared the same grasp type rather than the same target location. Scaling coefficients of transport/preshape- and grasp-related components showed invariant temporal coupling. Thus, grasp type influenced strongly both transport/preshape- and grasp-related muscle components, giving rise to grasp-based functional coupling between forelimb muscles. 
<br/><br/><br/>English 
<br/><br/><label>ISSN: </label>0022-2895 
<br/><br/><label>Subjects--Topical Terms: </label><br/>*Behavior, Animal/ph [Physiology]<br/>*Biomechanical Phenomena/ph [Physiology]<br/>*Forelimb/ph [Physiology]<br/>*Motor Activity/ph [Physiology]<br/>*Muscle, Skeletal/ph [Physiology]<br/>Animals<br/>Electromyography<br/>Macaca mulatta<br/>Male
<br/><br/><label>Subjects--Geographic Terms: </label><br/>MedStar National Rehabilitation Network
<br/><br/><label>Index Terms--Function: </label><br/>Journal Article