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过度扩张清醒兔直肠可诱发胃电活动显著抑制。这种抑制现象不为麻醉药物、骨骼肌松驰剂或切断双侧迷走神经所取消,但若毁损T_7—T_(11)胸段脊髓或切断双侧内脏大神经后就基本消失。静脉注射心得安可使这种抑制效应明显减弱。结果提示直肠扩张-胃电抑制反射基本中枢集中在T_7—T_(12)胸段脊髓内,传入与传出冲动主要由交感肾上腺能神经所携带,可能通过直接与胃平滑肌上β-受体结合或对抗迷走神经对胃壁内神经丛的兴奋作用而发挥对胃电活动抑制效应的
Overexpression of awake rabbits rectally induced gastric electrical activity was significantly inhibited. This inhibition was not canceled by anesthetic agents, skeletal muscle relaxants or bilateral vagus nerve denervation, but basically disappeared if the thoracic spinal cord of T7-T11 was severed or the bilateral visceral nerves were severed. Intravenous injection of ankle significantly reduced this inhibitory effect. The results suggest that the basic rectum dilatation-gastric electrical inhibition reflex central focus on the thoracic spinal cord T_7-T_ (12), the afferent and affective impulses are mainly carried by the sympathetic adrenal nerve, which may be directly related to β-receptor In combination with or against the excitatory effect of the vagus nerve on the gastric plexus and exerts its inhibitory effect on gastric electrical activity