Which LU point is on the antero-lateral aspect of the upper arm, 4 cun inferior to the axillary fold and 5 cun superior to LU-5, in the depression between the lateral border of the biceps brachii muscle and the shaft of the humerus?

Which LU point is on the antero-lateral aspect of the upper arm, 4 cun inferior to the axillary fold and 5 cun superior to LU-5, in the depression between the lateral border of the biceps brachii muscle and the shaft of the humerus?

• A. LU-3
• B. LU-2
• C. LU-1
• D. LU-4

Answer: (D)

The main idea here is locating Lung channel points by exact arm landmarks and cun measurements. The description places a point on the anterolateral upper arm, in the hollow between the lateral border of the biceps brachii and the shaft of the humerus, 4 cun below the axillary fold and about 5 cun above the elbow point at LU-5. That specific spot is Lung 4, known as Xiaohai. It sits in that depression along the upper arm, between LU-5 at the elbow and the more proximal region of the LU channel. The other LU points mentioned would be in different areas—LU-3 is higher and more medial on the upper arm, LU-2 is on the chest near the armpit, and LU-1 is in the chest region—so they don’t match the described location.

The main idea here is locating Lung channel points by exact arm landmarks and cun measurements. The description places a point on the anterolateral upper arm, in the hollow between the lateral border of the biceps brachii and the shaft of the humerus, 4 cun below the axillary fold and about 5 cun above the elbow point at LU-5. That specific spot is Lung 4, known as Xiaohai. It sits in that depression along the upper arm, between LU-5 at the elbow and the more proximal region of the LU channel. The other LU points mentioned would be in different areas—LU-3 is higher and more medial on the upper arm, LU-2 is on the chest near the armpit, and LU-1 is in the chest region—so they don’t match the described location.