《黄帝内经·素问·阴阳别论》
阳明与厥阴发病，主病惊骇，背痛，常常嗳气、呵欠，名曰风厥。
二阳一阴发病，主惊骇、背痛、善噫、善欠，名曰风厥。
If Yangming and Jueyin are attacked by disease, the main symptoms are fright, backache, and frequent belching and yawning; it’s called wind bier.