Influence of preoptico-anterior and posterior hypothalamus on midline thalamic neurons.
The present study was aimed at understanding the influence of the posterior hypothalamus (PH) and the preoptico-anterior hypothalamus (PO-AH) on the neurons of the midline thalamus (MTh) in encéphale isolé cats. A majority of the influenced neurons of the MTh showed increased firing on stimulation of the PH. Although the number of neurons showing increased or decreased firing on PO-AH stimulation were nearly equal, stimulus bound increased firing in many neurons was followed by a prolonged decreased firing. It is likely that the hypothalamo-thalamic circuit constitutes a parallel pathway to the reticulo-thalamic circuit for alteration of the cortical EEG.
D000200:Action Potentials; D000818:Animals; D002415:Cats; D003655:Decerebrate State; D004558:Electric Stimulation; D005260:Female; D007031:Hypothalamus / Q000502:physiology*; D007034:Hypothalamus, Posterior / Q000502:physiology*; D008297:Male; D009474:Neurons / Q000502:physiology*; D011301:Preoptic Area / Q000502:physiology*; D013788:Thalamus / Q000166:cytology / Q000502:physiology*