Abstract
Experiments on adult rabbits anesthetized with nembutal have shown that the negative phase of the somatosensory response consists of two negative components: primary and secondary. These components are unequally generalized over the cortex and they respond differently to different levels of anesthesia. They also differ in their sensitivity to application of strychnine and nembutal solutions. These facts suggest that the two components are reflections on the cortical surface of the activity of two separate ascending systems, differing in their subcortical genesis and in their synaptic organization in the cortex. Only the spatial overlap of these systems and their almost synchronized activity in the adult cortex determine the fusion of these two separate negative potentials into a common negative phase.
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Ata-Muradova, F.A., Chuppina, L.M. Dual nature of the negative phase of the primary sensorimotor cortical response in rabbits. Neurosci Behav Physiol 5, 37–46 (1972). https://doi.org/10.1007/BF01163377
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DOI: https://doi.org/10.1007/BF01163377