Visual neglect during intracarotid armobarbital testing
- 1 October 1990
- journal article
- research article
- Published by Wolters Kluwer Health in Neurology
- Vol. 40 (10) , 1600
- https://doi.org/10.1212/wnl.40.10.1600
Abstract
The unilateral suppression of hemispheric function by sodium amobarbital may result in hemispatial visual neglect, as measured by performance on a random letter cancellation task. Our study not only investigates this hypothesis but also attempts to identify more precisely the anatomic locus of control for directed attention to extrapersonal space by correlating scanning performance with EEG activity. Forty-eight consecutive patients with epilepsy underwent preoperative intracarotid amobarbital tests. The results indicated that disruption of scanning and contralateral neglect occurred only after right- hemisphere suppression and seemed specifically related to changes in right frontal lobe EEG activity. This pattern of perfor- mance held not only for right-handed subjects, but also for those who were left-handed, and even for those who had right- hemisphere language dominance.This publication has 16 references indexed in Scilit:
- Subcortical neglectNeurology, 1982
- Behavioral enhancement of visual responses in monkey cerebral cortex. II. Modulation in frontal eye fields specifically related to saccadesJournal of Neurophysiology, 1981
- Thalamic NeglectArchives of Neurology, 1981
- Unilateral hypokinesia and motor extinctionNeurology, 1981
- Observations on spontaneous facial expression after focal cerebral excisions and after intracarotid injection of sodium amytalNeuropsychologia, 1981
- Neglect following damage to frontal lobe or basal gangliaNeuropsychologia, 1980
- Thalamic neglectNeurology, 1979
- Right hemispheric dominance for mediating cerebral activationNeuropsychologia, 1979
- VISUAL-SPATIAL AGNOSIA ASSOCIATED WITH LESIONS OF THE RIGHT CEREBRAL HEMISPHEREBrain, 1950
- VISUAL DISORIENTATION WITH SPECIAL REFERENCE TO LESIONS OF THE RIGHT CEREBRAL HEMISPHEREBrain, 1941