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NEUROLOGY 1989;39:1183
© 1989 American Academy of Neurology

Attentional mechanisms during the intracarotid amobarbital test

K. Huh, MD, K. J. Meador, MD, D. W. Loring, PhD, G. P. Lee, PhD and B. S. Brooks, MD

Department of Neurology, Medical College of Georgia, Augusta, GA (Drs. Huh, Meador, and Loring)
Department of Surgery (Neurosurgery), Medical College of Georgia, Augusta, GA (Dr. Lee)
Department of Radiology (Dr. Brooks)

We investigated the integrity of attentional mechanisms following unilateral intracarotid amobarbital injection in 23 patients undergoing preoperative evaluation for epilepsy surgery. Performance for ipsilateral hand-button response to a quasi-random strobe flash was markedly altered following unilateral amobarbital injection as evidenced by decreased correct responses and increased perseverative errors. The increase in perseverations was inversely correlated with subsequent memory performance. The results indicate that unilateral amobarbital injection commonly produces a marked reduction in attention as well as disturbances in strategic control mechanisms.

Address correspondence and reprint requests to Dr. Meador, Section of Behavioral Neurology, Department of Neurology, Medical College of Georgia, Augusta, GA 30912.

Supported in part by NIH/NIA grant # 1 K08 AG00314.

Presented in part at the fortieth annual meeting of the American Academy of Neurology, Cincinnati, OH, April 1988, and at the 12th European conference of the International Neuropsychological Society, 1989.

Received December 13, 1988. Accepted for publication in final form March 15, 1989.




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