委陽 (Wěiyáng) — Bend Yang
Bladder channel · point 39
Traditionally used for
- Digestion
- Urinary & fluids
- Pain & joints
Location
On the popliteal crease, on the medial side of the tendon of biceps femoris, lateral to BL40.
How to locate: With the knee slightly flexed, find BL40 at the midpoint of the popliteal crease and move laterally along the crease; the point is in the depression just medial to the biceps femoris tendon, about 1 cun lateral to BL40.
Distances are in cun, a proportional unit — how to measure.
3D view
3D view not available for this point: its position on the 3D model couldn't be checked against its location text, so it is not shown. The 2D maps above show it.
Needling
Cited needling
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Perpendicular insertionDepth 1–1.5 cunskindeeper
Depths describe average adult habitus in the cited population, never a single safe number for the patient in front of you. Palpate and adjust.
Sources (1)
- Deadman P, Al-Khafaji M, Baker K. A Manual of Acupuncture. Hove: Journal of Chinese Medicine Publications; 1998 — p. 298 Supports: techniques (names this point)
Site notes · not cited
Functions
- Opens the water passages and promotes urination
- Harmonises and regulates the Triple Energiser
- Activates the channel and luo vessels and relieves pain
- Relaxes the sinews of the knee
Indications
Balance Method partners
Under Dr. Tan's six systems, BL39 at the back of knee balances these channels at the regions its segment images.
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1. Same Chinese nameSmall Intestine channelElbow · Mirror (arm ↔ leg)Elbow · Reversed mirrorUpper abdomen, Lower back · Image, head at the hand/footChest, Upper back · Image, head toward the elbow/kneeSolve for the Small Intestine channel →
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2. Branching (Bie Jing / Zang Fu Bie Tong)Lung channelElbow · Mirror (arm ↔ leg)Elbow · Reversed mirrorUpper abdomen, Lower back · Image, head at the hand/footChest, Upper back · Image, head toward the elbow/kneeSolve for the Lung channel →
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3. Interior–exterior pairKidney channelKnee, Back of knee · Same segment, opposite sideUpper abdomen, Lower back · Image, head at the hand/footChest, Upper back · Image, head toward the elbow/kneeSolve for the Kidney channel →
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4. Chinese clock oppositeLung channelElbow · Mirror (arm ↔ leg)Elbow · Reversed mirrorUpper abdomen, Lower back · Image, head at the hand/footChest, Upper back · Image, head toward the elbow/kneeSolve for the Lung channel →
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5. Chinese clock neighbourSmall Intestine channelElbow · Mirror (arm ↔ leg)Elbow · Reversed mirrorUpper abdomen, Lower back · Image, head at the hand/footChest, Upper back · Image, head toward the elbow/kneeSolve for the Small Intestine channel →
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6. Same channelBladder channelKnee, Back of knee · Same segment, opposite sideUpper abdomen, Lower back · Image, head at the hand/footChest, Upper back · Image, head toward the elbow/kneeSolve for the Bladder channel →
Clinical Notes
Sources
- World Health Organization. WHO Standard Acupuncture Point Locations in the Western Pacific Region. Manila: WHO Regional Office for the Western Pacific, 2008. (Location.)
- Focks C, ed. Atlas of Acupuncture. Edinburgh: Churchill Livingstone Elsevier, 2008. (Locating method and actions.)
📝 Notes
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