[Histaminergic receptor in the NTS involved in inhibition of carotid baroreflex induced by intracerebroventricular injection of HA in rats].

Aim: To explore the role of histaminergic receptors in the nucleus tractus solitarius (NTS) in the responses of carotid baroreflex (CBR) performance to the intracerebroventricular (ICV) injection of histamine (HA).

Methods: The left and right carotid sinus regions were isolated from the systemic circulation in 18 Wistar rats anesthetized with pentobarbital sodium. The intracarotid sinus pressure (ISP) was altered in a stepwise manner.