In which layer is the flexor digiti minimi brevis located?

In which layer is the flexor digiti minimi brevis located?

• A. 4th layer
• B. 1st layer
• C. 2nd layer
• D. 3rd layer

Answer: (D)

The main idea is where intrinsic hand muscles sit in the palm’s layers. The flexor digiti minimi brevis is a small deep muscle of the little finger in the hypothenar region, which falls into the deeper, third palmar layer. That placement reflects its role as a deeper palm muscle rather than a superficial one. It helps flex the little finger at the metacarpophalangeal joint and is innervated by the deep branch of the ulnar nerve, matching its deep, intrinsic position.

The main idea is where intrinsic hand muscles sit in the palm’s layers. The flexor digiti minimi brevis is a small deep muscle of the little finger in the hypothenar region, which falls into the deeper, third palmar layer. That placement reflects its role as a deeper palm muscle rather than a superficial one. It helps flex the little finger at the metacarpophalangeal joint and is innervated by the deep branch of the ulnar nerve, matching its deep, intrinsic position.