咽部反射嘔吐反射喉痙攣,是喉嚨後部的反射性收縮[1],在觸及口腔頂部,舌頭後部,扁桃體周圍區域,懸雍垂和喉嚨後面會觸發此反射。它與其他呼吸消化反射(如反射性咽部吞嚥)一起,避免在非正常吞嚥情形下,口腔內有異物進入喉嚨的情形,也可以防止異物堵塞呼吸道窒息

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