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

被引：9

作者：

Geed, Shashwati ^{[1
,2
,3
]}

van Kan, Peter L. E. ^{[1
]}

机构：

[1] Univ Wisconsin, Dept Kinesiol, Madison, WI USA

[2] MedStar Natl Rehabil Hosp, 102 Irving St NW, Washington, DC 20010 USA

[3] Georgetown Univ, Med Ctr, Dept Rehabil Med, Washington, DC 20007 USA

来源：

JOURNAL OF MOTOR BEHAVIOR | 2017年 / 49卷 / 03期

关键词：

grasping; motor control; multijoint control; temporal coupling; PRIMARY MOTOR CORTEX; MAGNOCELLULAR RED NUCLEUS; VENTRAL PREMOTOR CORTEX; PREHENSION MOVEMENTS; MACAQUE MONKEY; SELECTIVE PERTURBATION; OBJECT POSITION; RHESUS MACAQUES; RV-COEFFICIENT; ARM MOVEMENTS;

D O I：

10.1080/00222895.2016.1204265

中图分类号：

Q189 [神经科学];

学科分类号：

071006 ;

摘要：

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.

引用

页码：312 / 328

页数：17