The existence of two polysensory systems in the suprasylvian gyrus of the cat.
Acoustic, somatosensory and visual evoked potentials were mapped in the suprasylvian gyrus of the cat during pentobarbital or chloralose anaesthesia or during subsequent application of both anaesthetics. In chloralose anaesthesia both parietal association areas (AMSA, PMSA) are easily recognized. Under pentobarbital anaesthesia, however, no activity is detectable in PMSA, while somewhat anteriorly from AMSA a polysensory focus manifests itself with latencies equalling those in the primary sensory areas. It is supposed that in the suprasylvian gyrus two polysensory systems are localized, differing in their situation, electrophysiologic characteristics and sensitivity to anaesthetics.
D000758:Anesthesia; D000818:Animals; D001931:Brain Mapping; D002415:Cats / Q000502:physiology*; D002540:Cerebral Cortex / Q000502:physiology*; D002698:Chloralose; D005071:Evoked Potentials; D005072:Evoked Potentials, Auditory; D010424:Pentobarbital
D002698:Chloralose; D010424:Pentobarbital