Abstract
Rats were first trained on a black-white discrimination problem and were then subjected to either one-quadrant or two-quadrant neocortical injuries. Following a test of retention, the subjects again sustained one-quadrant or two-quadrant lesions, always such that one quadrant remained intact. Another test of retention was administered, and then some subjects were completely decorticated by removal of the final remaining quadrant, followed by a final retention test. The effects on retention following the first-stage lesions suggested the existence of an equipotential, cortically related retrieval mechanism. The deficits in performance following second-stage injuries suggested the existence of a second, independent, posteriorly specific mechanism. The findings demonstrated that not only does interoperative retraining facilitate retrieval of preoperatively established memories, but also that injuries to any component of the cortex will induce reorganizations that will then prevent memory-retrieval deficits after any combination of subsequent injuries to the cortex.
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R. G. Dewberry, personal communication, February 1982.
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This research was supported by a grant in aid from the Donald Jansen Fund of Ohio State University.
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Cloud, M.D., Meyer, D.R. & Meyer, P.M. Inductions of recoveries from injuries to the cortex: Dissociation of equipotential and regionally specific mechanisms. Psychobiology 10, 66–73 (1982). https://doi.org/10.3758/BF03327009
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DOI: https://doi.org/10.3758/BF03327009