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Alternate names: 背俞 bèi shù, Back Transport

Channel: BL, Foot Greater Yáng (tài yáng) Bladder Channel

Modern location: An acupoint located on the upper back, level with the inferior border of the spinous process of the first thoracic vertebra, 1.5 cùn lateral to the midline.

Classic location: In the depression on the nape of the neck, one cùn and five fēn either side of the spine, below the first vertebra. The point is found in straight sitting posture. (Zhēn Jiǔ Dà Chéng)

Local anatomy: The medial cutaneous branches of the posterior branches of the intercostal artery and vein. The medial cutaneous branches of the posterior rami of the 1st and 2nd thoracic nerves; deeper, their lateral cutaneous branches.

Action: Dispels the wind evil; resolves exterior heat; soothes the sinews and vessels; regulates the bones and joints.

Modern indications: Cough; heat effusion; headache; stiff nape; shoulder and back pain.

Classic indications: Headache and shivering; lumbar and back pain; throat impediment (hóu bì); fullness in the chest and panting; malarial disease; absence of sweating in cold damage; generalized heat effusion; painful knee that cannot bend or stretch; vexation and fullness with abdominal urgency.

Needle stimulus: Needling: 0.5 cùn downward oblique insertion. Moxa: 3‒7 cones; pole 10‒20 min.

Needle sensation: Distension and numbness, sometimes spreading over the back of the shoulder.

Point groups: Meeting point (huì xué) of the bones; intersection point (jiāo huì xué) of the hand and foot greater yáng (tài yáng) channels (SI and BL).

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