Electromyographic analysis of joint-dependent global synkinesis in the upper limb of healthy adults: Laterality of intensity and symmetry of spatial representation

Ing Shiou Hwang, Chun Hou Wang, Yi Ching Chen, Chiung Yu Cho, Kwok Tak Yeung

研究成果: Article

7 引文 (Scopus)

摘要

The intensity and spatial representation of electromyographical (EMG) activity were examined to characterize the effects of limb dominance and movement direction upon global synkinesis (GS). Twenty-two healthy young subjects (11 men, 11 women) with a mean age of 24.7 years participated in this study. Three trials of EMG activities from eight primary muscles in the unexercised limb were recorded when a maximal isometric contraction in various directions was performed by the shoulder, elbow, and wrist of the dominant and non-dominant upper limbs. The features of GS, including intensity and spatial representation, were quantified with standardized net excitation levels (SNE) and relative excitation (RE), respectively. Our data indicated that (1) GS intensity was strongly limb-dependent with a larger SNE level arising when target joints of the non-dominant upper limb were active, (2) the GS intensity was more influenced by movement direction of the non-dominant limb than by that of the dominant limb, (3) the gradient change in GS intensity was observed bilaterally with a larger SNE level associated with contralateral movements of a proximal joint than a distal joint, and (4) GS spatial representations of the upper limbs were patterned and symmetrical, but seemly insensitive to movement direction. Laterality in GS intensity and structured GS spatial representation with symmetry could be a consequence of use-dependent hemispheric organization.

原文English
頁(從 - 到)313-323
頁數11
期刊Journal of Electromyography and Kinesiology
16
發行號4
DOIs
出版狀態Published - 2006 八月 1

指紋

Synkinesis
Upper Extremity
Joints
Extremities
Isometric Contraction
Elbow
Wrist
Healthy Volunteers
Muscles

All Science Journal Classification (ASJC) codes

  • Neuroscience (miscellaneous)
  • Biophysics
  • Clinical Neurology

引用此文

@article{e0841de5685e4985a8f4d09865010ced,
title = "Electromyographic analysis of joint-dependent global synkinesis in the upper limb of healthy adults: Laterality of intensity and symmetry of spatial representation",
abstract = "The intensity and spatial representation of electromyographical (EMG) activity were examined to characterize the effects of limb dominance and movement direction upon global synkinesis (GS). Twenty-two healthy young subjects (11 men, 11 women) with a mean age of 24.7 years participated in this study. Three trials of EMG activities from eight primary muscles in the unexercised limb were recorded when a maximal isometric contraction in various directions was performed by the shoulder, elbow, and wrist of the dominant and non-dominant upper limbs. The features of GS, including intensity and spatial representation, were quantified with standardized net excitation levels (SNE) and relative excitation (RE), respectively. Our data indicated that (1) GS intensity was strongly limb-dependent with a larger SNE level arising when target joints of the non-dominant upper limb were active, (2) the GS intensity was more influenced by movement direction of the non-dominant limb than by that of the dominant limb, (3) the gradient change in GS intensity was observed bilaterally with a larger SNE level associated with contralateral movements of a proximal joint than a distal joint, and (4) GS spatial representations of the upper limbs were patterned and symmetrical, but seemly insensitive to movement direction. Laterality in GS intensity and structured GS spatial representation with symmetry could be a consequence of use-dependent hemispheric organization.",
author = "Hwang, {Ing Shiou} and Wang, {Chun Hou} and Chen, {Yi Ching} and Cho, {Chiung Yu} and Yeung, {Kwok Tak}",
year = "2006",
month = "8",
day = "1",
doi = "10.1016/j.jelekin.2005.07.012",
language = "English",
volume = "16",
pages = "313--323",
journal = "Journal of Electromyography and Kinesiology",
issn = "1050-6411",
publisher = "Elsevier Limited",
number = "4",

}

TY - JOUR

T1 - Electromyographic analysis of joint-dependent global synkinesis in the upper limb of healthy adults

T2 - Laterality of intensity and symmetry of spatial representation

AU - Hwang, Ing Shiou

AU - Wang, Chun Hou

AU - Chen, Yi Ching

AU - Cho, Chiung Yu

AU - Yeung, Kwok Tak

PY - 2006/8/1

Y1 - 2006/8/1

N2 - The intensity and spatial representation of electromyographical (EMG) activity were examined to characterize the effects of limb dominance and movement direction upon global synkinesis (GS). Twenty-two healthy young subjects (11 men, 11 women) with a mean age of 24.7 years participated in this study. Three trials of EMG activities from eight primary muscles in the unexercised limb were recorded when a maximal isometric contraction in various directions was performed by the shoulder, elbow, and wrist of the dominant and non-dominant upper limbs. The features of GS, including intensity and spatial representation, were quantified with standardized net excitation levels (SNE) and relative excitation (RE), respectively. Our data indicated that (1) GS intensity was strongly limb-dependent with a larger SNE level arising when target joints of the non-dominant upper limb were active, (2) the GS intensity was more influenced by movement direction of the non-dominant limb than by that of the dominant limb, (3) the gradient change in GS intensity was observed bilaterally with a larger SNE level associated with contralateral movements of a proximal joint than a distal joint, and (4) GS spatial representations of the upper limbs were patterned and symmetrical, but seemly insensitive to movement direction. Laterality in GS intensity and structured GS spatial representation with symmetry could be a consequence of use-dependent hemispheric organization.

AB - The intensity and spatial representation of electromyographical (EMG) activity were examined to characterize the effects of limb dominance and movement direction upon global synkinesis (GS). Twenty-two healthy young subjects (11 men, 11 women) with a mean age of 24.7 years participated in this study. Three trials of EMG activities from eight primary muscles in the unexercised limb were recorded when a maximal isometric contraction in various directions was performed by the shoulder, elbow, and wrist of the dominant and non-dominant upper limbs. The features of GS, including intensity and spatial representation, were quantified with standardized net excitation levels (SNE) and relative excitation (RE), respectively. Our data indicated that (1) GS intensity was strongly limb-dependent with a larger SNE level arising when target joints of the non-dominant upper limb were active, (2) the GS intensity was more influenced by movement direction of the non-dominant limb than by that of the dominant limb, (3) the gradient change in GS intensity was observed bilaterally with a larger SNE level associated with contralateral movements of a proximal joint than a distal joint, and (4) GS spatial representations of the upper limbs were patterned and symmetrical, but seemly insensitive to movement direction. Laterality in GS intensity and structured GS spatial representation with symmetry could be a consequence of use-dependent hemispheric organization.

UR - http://www.scopus.com/inward/record.url?scp=33745197964&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33745197964&partnerID=8YFLogxK

U2 - 10.1016/j.jelekin.2005.07.012

DO - 10.1016/j.jelekin.2005.07.012

M3 - Article

C2 - 16243541

AN - SCOPUS:33745197964

VL - 16

SP - 313

EP - 323

JO - Journal of Electromyography and Kinesiology

JF - Journal of Electromyography and Kinesiology

SN - 1050-6411

IS - 4

ER -