Flexor digiti minimi brevis muscle of hand

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Flexor digiti minimi brevis muscle of the hand is a small muscle located in the hand that belongs to the group of muscles known as the intrinsic muscles of the hand. Its primary function is to facilitate the flexion of the little finger, also known as the fifth digit, at the metacarpophalangeal joint (MCP joint). This action is crucial for gripping and manipulating objects with the hand.

Anatomy

The Flexor digiti minimi brevis muscle of the hand originates from the hook of the hamate bone and the flexor retinaculum of the hand. It inserts into the base of the proximal phalanx of the fifth digit. The muscle is innervated by the ulnar nerve, specifically from the deep branch of the ulnar nerve. Its blood supply comes from the ulnar artery.

Function

The primary function of the Flexor digiti minimi brevis muscle is to flex the little finger at the metacarpophalangeal joint. This action is essential for the performance of a strong grip and for the manipulation of objects with the hand. The muscle works in coordination with other muscles of the hand to achieve fine motor control.

Clinical Significance

Injury or pathology affecting the Flexor digiti minimi brevis muscle can lead to difficulty in flexing the little finger, which can impair hand function. Conditions such as ulnar nerve entrapment or trauma to the hand can affect the performance of this muscle.

See Also

• Intrinsic muscles of the hand
• Metacarpophalangeal joint
• Ulnar nerve
• Flexor retinaculum of the hand