[Unit activity in the ventral tegmental area and the state of focused attention in the normal awake cat].
Our previous studies had indicated that electrocortical "beta" rhythms (37 Hz) that develop in the fronto-parietal area in waking, immobile and highly attentive cats, are under the control of a dopaminergic system originating from the ventral tegmental area (VTA). A single unit study has now shown that 9% of VTA cells displayed a sustained increased of their firing rate during each beta episode. These data indicate that VTA cells exert a "gate control" on the rhythmic thalamo-cortical beta system.
D000818:Animals; D001288:Attention / Q000502:physiology*; D001611:Beta Rhythm; D002415:Cats; D004594:Electrophysiology; D013681:Tegmentum Mesencephali / Q000502:physiology*; D014851:Wakefulness / Q000502:physiology*
Activité unitaire dans l'aire tegmentale ventrale et état d'attention focalisée chez le chat normal éveillé.