EFFECTS OF PARTIAL HYPOTHALAMIC DEAFFERENTATIONS ON ADRENOCORTICAL RESPONSES

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Abstract
The effects of ether stress and photic and acoustic stimulation on adrenocortical responses were studied in normal rats and in three groups of animals with partial hypothalamic anterior, anterolateral and posterolateral deafferentations, respectively. Animals with anterior deafferentation only, show the same responses as the intact rats, while in the two other groups the response to ether was normal, but that to photic and acoustic stimulation was significantly inhibited. These data would indicate that the transmission of impulses in the medial forebrain bundle and possibly posterior sensory inputs to the hypothalamus play an important role in the adrenocortical responses following neurogenic stimulation.

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