《黄帝内经·灵枢·忧患无言》
黄帝问少师道：有人突然因忧愁恨怒，引起张口说话但不能发音，是人体内哪条通道被阻塞了？
黄帝问于少师曰：人之卒然忧恚，而言无音者，何道之塞？
The Yellow Emperor asked Shao Shi: When someone is sad and angry, leading to the inability to speak with the mouth open, which channel in the human body is blocked?