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Brain, Vol. 112, No. 1, 103-111, 1989
© 1989 Oxford University Press

research-article

HEMISPHERE ASYMMETRY FOR EYE GAZE MECHANISMS

K. J. MEADOR1,, D. W. LORING1, G. P. LEE2, B. S. BROOKS3, F. T. NICHOLS1,4, E. E. THOMPSON1, W. O. THOMPSON5 and K. M. HEILMAN6,7

1Department of Neurology, Medical College of Georgia Augusta, GA, USA 2Department of Surgery (Neurosurgery), Medical College of Georgia Augusta, GA, USA 3Department of Radiology, Medical College of Georgia Augusta, GA, USA 4Department of VA Medical Center Augusta, GA, USA 5Office of Research Computers and Statistics, Medical College of Georgia Augusta, GA, USA 6Department of Neurology, School of Medicine, University of Florida Gainesville, FL, USA 7VA Medical Center Gainesville, FL, USA

Correspondence to: Correspondence to: Dr K. J. Meador, Section of Behavioral Neurology, Department of Neurology, Medical College of Georgia, Augusta, Georgia 30912, USA

To investigate left/right asymmetries in cerebral gaze mechanisms, eye deviation was evaluated in 90 patients following intracarotid sodium amylobarbitone injections For right-handed subjects with left cerebral language dominance, the occurrence and severity of eye deviation were greater for right versus left hemisphere injections In contrast, subjects with mixed cerebral dominance for language/handedness exhibited no left/right difference in the incidence of eye deviation The results are consistent with right cerebral dominance for attentional/intentional mechanisms directed at external space. Further analysis suggests that the cerebral asymmetry for gaze may be due to an evolutionary loss of attentional/intentional mechanisms by the left cerebral hemisphere as language function developed.

Received December 1, 1987. Revised March 8, 1988. Accepted March 16, 1988.


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