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BL-29 Central Backbone Transport
中膂俞 〔中膂俞〕 zhōng lǚ shù
Alternate names: 脊内俞 jǐ nèi shù, Spine Inner Transport; 旋俞 xuán shù, Return Transport; 中膂 zhōng lǚ, Central Backbone; 中膂内俞 zhōng lǚ nèi shù, Central Backbone Inner Transport
Channel: BL, foot greater yáng (tài yáng) bladder channel
Modern location: An acupoint located on the sacrum, level with the third sacral foramen, 1.5 cùn lateral to the midline.
Classical location: One cùn and five fēn either side of the spine, below the twentieth vertebra. The point is found in prostrate posture. From
Local anatomy: Posterior branches of the lateral sacral artery and vein, branches of the inferior gluteal artery and vein. The lateral branches of the posterior rami of the 3rd and 4th sacral nerves.
Action: Strengthens the lumbar vertebrae; warms yáng and disperses cold.
Modern indications: Diarrhea; mounting qì (shàn qì, inguinal hernia); painful stiffness of the lumbar vertebrae.
Classical indications: Intestinal cold; kidney vacuity dispersion-thirst; absence of sweating; rib-side pain; abdominal distension.
Needle stimulus: Needling: 0.7‒1.0 cùn perpendicular insertion. Moxa: 3‒7 cones; pole 20‒30 min.
Point name meaning:
- 中 zhōng: center, central, middle (also zhòng, to strike)
- 膂 lǚ: backbone; muscles parallel to the backbone
- 俞 shù: acupuncture point
Deriving the name Central Backbone Transport (zhōng lǚ shù) from its location at the center of the body, amongst the muscles that run parallel to the spine, this point functions in treating disorders of the back and spine. In addition,