Which LU point is on the antero-lateral aspect of the upper arm, 3 cun inferior to the axillary fold and 6 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, 3 cun inferior to the axillary fold and 6 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-4
• B. LU-1
• C. LU-3
• D. LU-2

Answer: (C)

The location described points to the upper-arm point known as LU-3. This point sits on the anterior-lateral aspect of the upper arm, in the hollow between the lateral edge of the biceps brachii and the shaft of the humerus. The distance cues—three cun below the axillary fold and six cun above LU-5 (the elbow point)—fit the standard description of this point precisely. Think of the arm as a vertical line from armpit to elbow, with LU-3 tucked into that specific groove on the outer front of the upper arm. The other options aren’t in that same location: they’re either on the chest region or in a different part of the upper arm, not the depression between the biceps margin and the humerus.

The location described points to the upper-arm point known as LU-3. This point sits on the anterior-lateral aspect of the upper arm, in the hollow between the lateral edge of the biceps brachii and the shaft of the humerus. The distance cues—three cun below the axillary fold and six cun above LU-5 (the elbow point)—fit the standard description of this point precisely.

Think of the arm as a vertical line from armpit to elbow, with LU-3 tucked into that specific groove on the outer front of the upper arm. The other options aren’t in that same location: they’re either on the chest region or in a different part of the upper arm, not the depression between the biceps margin and the humerus.