《灵枢·经脉》：大肠手阳明之脉，起于大指次指之端，循指上廉，出合谷两骨之间，上入两筋之中，循臂上廉，入肘外廉，上臑外前廉，上肩，出髃骨之前廉，上出于柱骨之会上，下入缺盆，络肺，下膈，属大肠。

The Chapter "Discussion on the Meridians" in Miraculous Pivot says: the Large Intestine Meridian starts from the tip of the index finger, running upward along the radial side of the index finger and passing through the interspace of the 1st and 2nd metacarpal bones, it enters the depression between the tendons of m.extensor pollcis longus and brevis. Then,running on along the anterior aspect of the forearm, it reaches the lateral side of the elbow. Then it ascends along the lateral anterior aspect of the upper arm to the highest point of the shoulder, then along the anterior border of the acromion, it goes up to the cervical vertebra and descends to Quepen(ST12) and connects with lung. Then it passes through the diaphragm and enters the large intestine, its pertaining organ.医学 全在.线提供www.med126.com

其支者：从缺盆上颈，贯颊，入下齿中；还出挟口，交人中——左之右、右之左，上挟鼻孔。

The branch from Quepen(ST12) runs upward to the neck, passes through the cheek and enters the lower gums. Then it turns back to the upper lip and crosses the opposite meridian at Renzhong(the philtrum). The left meridian goes to the right and the right meridian to the left, to the contralateral sides of the nose.