Conclusions
Ribonuclease, injected directly into the brain through permanently implanted cannulas, causes reversible loss of conditioned reflexes. This was observed in 80% of experiments with injection into the hippocampus, in 17.7% with injection into the motor cortex, and in 20% of experiments with injection into the visual cortex.
Control injection of physiological saline and serum albumin into these structures did not disturb conditioned-reflex activity.
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Voronin, L.G., Tushmalova, N.A. & Kazennova, I.I. Role of ribonucleic acid in preservation of temporary connections. Neurosci Behav Physiol 2, 536–542 (1968). https://doi.org/10.1007/BF01125445
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DOI: https://doi.org/10.1007/BF01125445