卷之二四诊正法脉有阴阳乘伏

难经云∶脉有伏匿然．谓阴阳更相乘．更相伏也．脉居阴部．而反阳脉见者．为阳乘阴也．脉虽时沉涩而短．此谓阳中伏阴也．脉居阳部而反阴脉见者．为阴乘阳也．脉虽时浮滑而长．此谓阴中伏阳也．