Abstract:
OBJECTIVE:To learn to which portions of a line normal subjects would attend when watching this line actually moving or when perceiving movement even in the absence of actual movement, an illusory movement. METHODS:Twenty normal subjects watched a computer monitor on which either lines or dots moved to the right or left. They also watched stationary lines, which appeared to be moving to the left or right because the background was moving in the opposite direction. While watching these lines or dots, their eye movements were monitored to determine the position of fixation. RESULTS:Overall, subjects fixated on the side of the line that was in the direction of real or illusory movement. In the actual movement condition, leftward motion induced more of an attentional bias than rightward motion. In the illusory movement condition, however, rightward illusory movement condition induced more of an attentional bias than leftward movement. CONCLUSIONS:Objects moving leftward or rightward primarily activate the contralateral hemisphere. This hemispheric activation may induce a contralateral overt orienting response that is reflected by eccentric eye fixation. Treatments of neglect, such as caloric vestibular stimulation, may alter an attentional bias by inducing the illusion of movement.
journal_name
Neurologyjournal_title
Neurologyauthors
Jeong Y,Lee BH,Ahn HJ,Park KC,Heilman KM,Na DLdoi
10.1212/01.wnl.0000120546.14213.c7subject
Has Abstractpub_date
2004-04-27 00:00:00pages
1333-7issue
8eissn
0028-3878issn
1526-632Xjournal_volume
62pub_type
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