我们进食的时候,口腔内部会受到刺激,大脑就会下令分泌能帮助消化食物的唾液,其中又以酸的食物所产生的刺激最为强烈。
When we are eating, we get oral stimulation. Our brain would command the mouth to secrete saliva in order to help digest the food. Among which, sour food induces the most stimulation.