EFFECTS OF HAND-USED ON UNILATERAL SPATIAL NEGLECT - A CASE-STUDY

Citation
T. Fujii et al., EFFECTS OF HAND-USED ON UNILATERAL SPATIAL NEGLECT - A CASE-STUDY, Tohoku Journal of Experimental Medicine, 180(1), 1996, pp. 73-81
Citations number
18
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Medicine, Research & Experimental
ISSN journal
0040-8727
Volume
180
Issue
1
Year of publication
1996
Pages
73 - 81
Database
ISI
SICI code
0040-8727(1996)180:1<73:EOHOUS>2.0.ZU;2-1
Abstract
It was originally claimed that left hand use on li:ne bisection tasks reduced the extent of left neglect by Halligan and Marshall. However, in a following study, the same research group failed to reproduce this left hand amelioration effect if the left hand was initially placed o n the right side, and they claimed that spatio-motor cueing was more i mportant in reducing unilateral neglect than the hand used. The presen t study concerns with the validity of these two theoretical views on m odification of unilateral neglect, i.e., hemispheric activation and sp atio-motor cueing. A patient with left unilateral neglect and a slight left hemiparesis participated in three experiments. Under conventiona l testing condition, line bisection performed with the right hand show ed more severe left neglect than when performed with the left hand. Th ese hand effects were modified by changing a starting position of the patient's hand when bisecting horizontal lines. However, under body-fi xed condition, effects of hand-used as well as starting position were again significant. The results suggest that not only spatio-motor cuei ng but also differential hemispheric activation can exert a profound e ffect on unilateral neglect.