Polstysnaptic responses of the thoracic sympathetic preganglionic neurons to electrical stimulation of the rostral ventrolateral medulla in cats

摘要

To study the characteristics of the postsynaptic potentials in thoracic sympathetic preganglionic nerous (SPNs) evoked by electrical stimulation of the rostral ventrolateral medulla (RVLM) in cats. Methods: In 11 α-chloralose/urethane anesthetized, artificially ventilated cats, intracelular recordings were made form T_3 spinal cord with microelectrodes filled with 3 mol/L KCl. SPNs were identified by antidromic stimulation of the T_3 white ramus. Results: Twenty-four SPNs were recorded, the resting membrane potentials of which ranged between -45～-90 mV.