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Lateralization and One-trial Inter-hemispheric Transfer of Avoidance Conditioning



MANY workers have demonstrated the use of spreading cortical depression to lateralize the effects of conditioning to one cerebral hemisphere. Russell and Ochs1 have shown that food-reinforced bar-pressing lateralized to one hemisphere could be transferred to the other hemisphere with a single reinforced trial during bilateral cortical function. More recently Russell and Ochs2 showed that a necessary condition for such one-trial inter-hemispheric transfer of a memory trace was the presence of reinforcement during bilateral function. If animals were allowed to perform the conditioned response in the absence of reinforcement no transfer was found.

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  1. 1

    Steele Russell, I., and Ochs, S., Science, 133, 1077 (1961).

  2. 2

    Steele Russell, I., and Ochs, S., Brain, 86, 37 (1963).

  3. 3

    Bureš, J., and Burešovà, O., J. Comp. and Physiol. Psychol., 53, 558 (1960).

  4. 4

    Steele Russell, I., and Ross, R. B. (unpublished results).

  5. 5

    Ross, R. B., Nature, 201, 109 (1964).

  6. 6

    Chamberlain, T. J., Halick, P., and Gerard, R. W., J. Neurophysiol., 26, 662 (1963).

  7. 7

    McGaugh, J. L., Westbrook, W. H., and Thompson, C. W., J. Comp. and Physiol. Psychol., 55, 710 (1962).

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