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Enhanced spatial discrimination in paretic hands.

Authors
 Won Y. Doh  ;  Suk Y. Kang  ;  Young H. Sohn 
Citation
 CLINICAL NEUROPHYSIOLOGY, Vol.119(5) : 1153-1157, 2008 
Journal Title
CLINICAL NEUROPHYSIOLOGY
ISSN
 1388-2457 
Issue Date
2008
MeSH
Afferent Pathways/physiology ; Female ; Hand/innervation* ; Humans ; Male ; Middle Aged ; Motor Cortex/injuries ; Paresis/physiopathology* ; Psychomotor Performance/physiology ; Sensory Thresholds/physiology ; Space Perception/physiology* ; Stroke/physiopathology* ; Touch/physiology*
Keywords
Sensory thresholds ; Paresis ; Acute stroke ; Discrimination
Abstract
OBJECTIVE: Proper interaction between the sensory and motor system is essential for adequate control of voluntary movement. The influence of sensory alteration on motor activity is well known, while the effect of motor disturbance on sensory activity has yet to be clarified. We performed this study to investigate the influence of motor deactivation on sensory discrimination.

METHODS: Using Johnson-Van Boven-Phillips domes, we evaluated tactile spatial discrimination (grating orientation threshold; GOT) in 62 patients with acute pure motor stroke and 75 age-matched healthy controls.

RESULTS: In controls, the GOT was significantly lower in the dominant than in the non-dominant hands. The GOT was significantly reduced in patients' paretic hand, as compared to their unaffected hand and the hands of healthy controls in both the dominant and non-dominant side. The GOT of patients' paretic hand was significantly and inversely correlated to severity of their initial motor deficit in the non-dominant side (r=0.40, p<0.05), but not in the dominant side.

CONCLUSIONS: These results suggest that motor deprivation enhances ascending sensory inputs.

SIGNIFICANCE: This study provides additional information about the relationship between the motor and sensory system in humans
Full Text
http://www.sciencedirect.com/science/article/pii/S1388245708000205
DOI
10.1016/j.clinph.2008.01.002
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Neurology (신경과학교실) > 1. Journal Papers
Yonsei Authors
Sohn, Young Ho(손영호) ORCID logo https://orcid.org/0000-0001-6533-2610
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/107733
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