Flexor pollicis brevis muscle

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The flexor pollicis brevis muscle is a muscle of the hand that flexes the thumb (brings the thumb toward the palm of the hand) when contracted.


Abductor digiti minimi muscle (Hand) Flexor digiti minimi brevis muscle (Hand) Lumbrical muscles (Hand) Lumbrical muscles (Hand) Lumbrical muscles (Hand) Lumbrical muscles (Hand) Palmaris brevis muscle Flexor pollicis brevis muscle Abductor pollicis brevis muscle Opponens pollicis muscle Adductor pollicis muscle'The muscles of the hand.'

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Anatomy diagram of a left hand, with the palm facing forward.

Contents

Origin

The flexor pollicis brevis originates from the flexor retinaculum in the wrist and the tubercle of the trapezium bone.

Insertion

The flexor pollicis brevis inserts at the base of the proximal phalanx of the thumb.

Action

The flexor pollicis brevis flexes the metacarpophalangeal joint of the thumb.

Innervation

The flexor pollicis brevis is innervated by the muscular branch of the median nerve (C8 and T1).

See also

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