title: Attentional bias induced by viewing actual or illusory movements.
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.
authors.affiliation: Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
authors.forename: Y
authors.initials: Y
authors.lastname: Jeong
authors.forename: B H
authors.initials: BH
authors.lastname: Lee
authors.forename: H J
authors.initials: HJ
authors.lastname: Ahn
authors.forename: K C
authors.initials: KC
authors.lastname: Park
authors.forename: K M
authors.initials: KM
authors.lastname: Heilman
authors.forename: D L
authors.initials: DL
authors.lastname: Na
mesh_terms: D000328:Adult; D001288:Attention / Q000502:physiology*; D002138:Calibration; D005133:Eye Movements / Q000502:physiology; D005260:Female; D005403:Fixation, Ocular / Q000502:physiology; D007839:Functional Laterality; D006801:Humans; D008297:Male; D009039:Motion Perception / Q000502:physiology*; D009903:Optical Illusions / Q000502:physiology*; D010775:Photic Stimulation / Q000379:methods; D012016:Reference Values