Course
The channel originates in the lower part of the abdomen below the umbilicus, makes its downward way through the perineum, then ascends along the middle of the spinal column, and reaches Fengfu(DU16) at the back of the neck where it enters the brain. I1 continues to ascend from Fengfu(DU16), along the midline of the head and passing the vertex, forehead, columella of the nose and the upper lip, then to Yinjiao(DU28).
The branches from this channel connect with the kidney and travel through the heart.

Taodao(GV13)
Location: On the low back and on the posterior midline, in the depression below the spinous process of the 1st thoracic vertebra
Indications: Stiffness of back. headache, marlaria, fever.
Method: Puncture obliquely upward 0.5-1.0 inch. Moxibustion is applicable.
Regional anatomy
Vasculature: The posterior branch of the first intercostal artery.
Innervation: The medial branch of the posterior ramus of the first thoracic nerve.

The lung Meridian picture of Taodao(GV13) Acupoint	Body surface picture of Taodao(GV13) Acupoint
Anatomy picture of Taodao(GV13) Acupoint	Section picture of Taodao(GV13) Acupoint