Musculus abductor digiti minimi manus

Musculus abductor digiti minimi manus, also known as the abductor digiti minimi muscle of the hand, is a small muscle located in the hand. It is responsible for the abduction of the little finger, which means it moves the little finger away from the other fingers. In this article, we will explore the anatomy, function, and clinical significance of the musculus abductor digiti minimi manus.

Anatomy

The musculus abductor digiti minimi manus is located in the hypothenar eminence of the hand, which is the fleshy area on the ulnar side of the palm. It arises from the pisiform bone, a small bone located on the ulnar side of the wrist. From there, it extends along the ulnar side of the hand and inserts into the base of the proximal phalanx of the little finger.

Function

The main function of the musculus abductor digiti minimi manus is to abduct the little finger. This means that it moves the little finger away from the other fingers, allowing for independent movement. It works in conjunction with other muscles in the hand to perform various fine motor tasks, such as gripping objects and manipulating tools.

Clinical Significance

Injuries or conditions affecting the musculus abductor digiti minimi manus can result in functional impairment of the little finger. For example, damage to the muscle or its nerve supply can lead to weakness or paralysis of the abductor function, making it difficult to move the little finger away from the other fingers. This can impact activities that require precise finger movements, such as playing musical instruments or typing.

See Also

• Muscles of the hand
• Hypothenar eminence
• Little finger