Reflex discharges into thoracic white rami elicited by somatic and visceral afferent excitation

摘要: 1. Reflex discharges in white rami (WR) were elicited by single-shock stimulation of dorsal roots (DR), splanchnic (SPL) and intercostal nerves (IC). 2. The reflexes have been compared anaesthetized cats with intact neuraxis, after mid-brain transection high cord transection. brain stem can maintain moderate inhibition the WR responses, but strong IC responses. After all are released again. 3. Stimulation ventromedial medullary reticular substance could completely, independently, inhibit maximal SPL-to-WR IC-to-WR reflexes. 4. Carotid sinus distension did not reduce indicating that major part volley is vasoconstrictor fibres. 5. Central delay DR-to-WR responses longer than DR-to-IC unchanged transections neuraxis at or spinal levels. 6. There was no facilitation a prior conditioning visceral somatic afferent pathway contrast to early