Flexor digiti quinti brevis muscle

Flexor digiti quinti brevis muscle (FDQB) is a muscle located in the hand that belongs to the group of muscles responsible for flexing the fingers, specifically the little finger. It plays a crucial role in the intricate movements of the hand, contributing to the ability to grasp and manipulate objects.

Anatomy[edit | edit source]

The FDQB is situated in the palm of the hand, on the ulnar side, which is the side of the little finger. It originates from the hamate's hook and the adjacent flexor retinaculum. It inserts into the base of the proximal phalanx of the fifth digit (little finger). The muscle is innervated by the Ulnar nerve, which provides the control necessary for its function. The blood supply to the FDQB comes from the ulnar artery.

Function[edit | edit source]

The primary function of the FDQB is to flex the proximal phalanx of the little finger at the metacarpophalangeal joint, contributing to the hand's grip strength and dexterity. This action is particularly important for tasks that require a strong grip or the manipulation of small objects.

Clinical Significance[edit | edit source]

Injuries or conditions affecting the FDQB can impair hand function, leading to difficulties in performing tasks that require fine motor skills. Conditions such as Carpal tunnel syndrome or ulnar nerve entrapment can affect the performance of the FDQB due to their impact on the muscle's nerve supply. Treatment for such conditions may include physical therapy, medication, or surgery, depending on the severity and underlying cause.