Rats with histologically confirmed bilateral lesions of one or both somatosensory cortical areas, occipital cortex, or sham operations were tested in a T-maze for the ability to relearn five tactile discriminations acquired before surgery. Although some lesioned rats were slow in relearning the discriminations, almost all animals mastered each of the problems in the allotted time, and analyses of variance failed to reveal group differences in errors to criterion on any of the tasks. Results contrast with severe deficits obtained in acquisition experiments under otherwise similar conditions.
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