title: Posttetanic potentiation of primary response and late negative wave in the somatosensory region of the cortex of the cat.
abstract: The experiments were carried out on cats under nembutal anesthesia. Stimulation of the ventroposterolateral nucleus of the thalamus or the white matter by a single stimulus elicited a primary response in the middle layers of the somatosensory cortex, and after it, a late negative wave, the duration of which reaches 40-70 msec. This potential does not have dipole reflection on the surface of the cortex and is apparently generated primarily by stellate cells. As a result of the tetanization of the ventroposterolateral nucleus or the white matter, a sharp increase in the amplitude of the late negative wave is observed, i.e., its posttetanic potentiation, while the primary response changes to a significantly lesser degree. Posttetanic potentiation is observed for 2-2.5 h. Posttetanic potentiation of the late negative wave is probably governed by processes occurring at the level of the middle layers of the cerebral cortex.
authors.affiliation: Laboratory of the General Physiology of the Cerebral Cortex, I. S. Beritashvili Institute of Physiology, GSSR, Tbilisi.
authors.forename: I V
authors.initials: IV
authors.lastname: Ocherashvili
authors.forename: R P
authors.initials: RP
authors.lastname: Kashakashvili
mesh_terms: D000758:Anesthesia; D000818:Animals; D002415:Cats; D003712:Dendrites / Q000502:physiology; D004558:Electric Stimulation; D005073:Evoked Potentials, Somatosensory / Q000502:physiology*; D013003:Somatosensory Cortex / Q000502:physiology*; D013569:Synapses / Q000502:physiology*; D013787:Thalamic Nuclei / Q000502:physiology