Effect of cortical implanatations of radioactive cobalt on learned behavior of rhesus monkeys.
- 1 January 1955
- journal article
- research article
- Published by American Psychological Association (APA) in Journal of Comparative and Physiological Psychology
- Vol. 48 (5) , 432-436
- https://doi.org/10.1037/h0044104
Abstract
Irradiation of the cortex of the rhesus monkey by cobalt 60 placed at the surface of either the frontal or temporal lobe, delivering a dosage of either 8000 or 4000 r at 5 mm from the source, produces immediate total loss on delayed-response, two-trial discrimination, and crossed-strings tests. Recovery is gradual and progressive and is usually complete by 20 days from time of implantation. Surgical ablation immediately after irradiation of the area (which becomes necrotic from a 4000-r dose) does not prevent occurrences of the syndrome of learning loss and subsequent recovery.Keywords
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