[Regulation pathways of expectancy behavior in the cat: histologic study].
In the behaving cat, motion expectancy of an event to occur (for a prey to appear) is accompanied by the development of 14 Hz electrocortical mu rhythms in the hand subarea of cortical somatic area SI. Our first aim here was to identify subcortical sites projecting to this cortical mu focus, using localised retrograde HRP marking. The only site thus labelled was the thalamic zone well known to project to the cortical mu area, and to act as a generator for the mu rhythms (ventral posterior nucleus, VP); no other deep structure could be identified, that could have been considered as a putative zone for control of cortical mu. We then injected minute amounts of HRP into the thalamic mu zone; labelled neurones were located (apart from those expected in the relays of the somatic pathway) in locus coeruleus (bilaterally) and ipsilaterally in the thalamic nuclei anteroventralis and laterodorsalis. In brief then, it seems that the regulation of the VP-SI mu channel (that we could previously demonstrate), by other deep structures is exerted upon the thalamic side.
Bouyer
J J
JJ
Institut des Neurosciences, U.A. 1199, C.N.R.S., Université-Pierre-et-Marie-Curie, Département de Neurophysiologie comparée, Paris.
Tilquin
C
C
Delagrange
P
P
Rougeul
A
A
Buser
P
P
D000818:Animals; D001522:Behavior, Animal / Q000502:physiology*; D002415:Cats / Q000502:physiology*; D002540:Cerebral Cortex / Q000166:cytology / Q000502:physiology; D013788:Thalamus / Q000166:cytology / Q000502:physiology
Voies de régulation du comportement d'attente chez le chat: étude histologique.