[Hemodynamic reactions in response to simultaneous nociceptive and amygdalar influences following stimulation and removal of the cervical sympathetic nerves]

Abstract

In cats, nociceptive stimulation and stimulation of amygdala elicited pressor reaction which was much more obvious at the combination of these stimuli. In sympathectomized animals, these stimuli produced a weaker pressor reaction. Combination of sympathetic nerve stimulation with the nociceptive stimulation and stimulation of amygdaloid complex elicited different reactions depending on the order of stimulation. After sympathectomy, separate stimulations produced a decrease of the blood flow rate; the same was obtained after combination of stimulation of the amygdaloid complex with nociceptive stimuli; however, complex effects also depended on the order of stimuli.