喷嚏反射的生理机制很复杂，尚未全明，基本过程包括鼻相及呼吸相。前者由刺激物激惹鼻粘膜三叉神经感受器开始，传入冲动经前筛、后鼻、眼下神经终于桥、延脑核，传出纤维经面神经的中间神经和岩大浅神经到达蝶腭书，交换突触后的节后纤维用于鼻，使血管扩张和腺体分泌、鼻粘 The physiological mechanism of sneezing reflex is complex, not yet fully understood. The basic processes include nasal phase and respiratory phase. The former stimulates the nasal mucosa trigeminal nerve receptors by stimulus, the impulse through the front screen, the nose, the nerve at the end of the bridge finally, the nucleus extensor, the outgoing fibers through the facial nerve and petrous nerve to reach the butterfly palate, Postganglionic postganglionic exchange of fibers for the nose, so that vasodilation and glandular secretion, nasal stick