Abstract

1. In response to stimulation of the splanchnic nerve, biphasic and multiphasic evoked potentials with relatively short (16–25 msec) and longer (30–54 msec) latent periods are recorded in the cat caudate nucleus. 2. Evoked potentials in response to stimulation of the splanchnic and tibial nerves and to clicks are not recorded from all points of the caudate nucleus, indicating its heterogeneity relative to representation of different afferent systems, including the visceral. 3. Extirpation of cortical somatosensory areas I and II, and also ablation of the neocortex, do not abolish evoked potentials in the ipsilateral caudate nucleus in response to splanchnic nerve stimulation.

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