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Channel: SI, hand greater yáng (tài yáng) small intestine channel

Modern location: An acupoint located on the ulnar aspect of the hand, in the depression between the base of the fifth metacarpal bone and the triquetral bone.

Classical location: On the outer side of the hand, in the depression by the prominent bone in front of the wrist. From The Great Compendium of Acupuncture and Moxibustion (针灸大成 zhēn jiǔ dà chéng)

Local anatomy: The posterior carpal artery (the branch of the ulnar artery), the dorsal venous network of the hand. The dorsal branch of the ulnar nerve.

Action: Courses greater yáng (tài yáng) channel evils; clears small intestinal damp-heat.

Modern indications: Headache; stiff nape; eye screens; jaundice; malarial disease; febrile disease; hypertonicity of the fingers; wrist pain.

Classical indications: Absence of sweating in febrile disease; throat impediment (hóu bì); nasal congestion; sniveling and nosebleed; dispersion-thirst; hypertonicity of the finger; pain in the forearm; weak aching wrist.

Needle stimulus: Needling: 0.2‒0.5 cùn perpendicular insertion. Moxa: 3 cones; pole 5‒20 min.

Point groups: Source point (yuán xué).

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