Hawaii Massage License Practice Exam

Which muscle is responsible for extending the little finger?

1. Flexor digiti minimi

2. Extensor digiti minimi

3. Palmaris longus

4. Abductor digiti minimi

The correct answer is: Extensor digiti minimi

The muscle responsible for extending the little finger is the extensor digiti minimi. This muscle is specifically designed to allow for the extension of the fifth digit, which is the little finger. It originates from the common extensor tendon and inserts at the extensor expansion of the little finger, making it essential for movements that involve straightening the finger. In contrast, the flexor digiti minimi primarily functions to flex the little finger, while the palmaris longus does not have a direct action on any finger but instead plays a role in wrist flexion. The abductor digiti minimi is involved in the abduction of the little finger rather than its extension. Understanding these functional differences among the muscles of the hand allows for better comprehension of their roles in finger movements.