Abductor pollicis brevis muscle :-

Thenar eminence muscle :-

Abductor pollicis brevis muscle :-

Muscle details :-

abductor pollicis brevis muscle

  • The abductor pollicis brevis is a flat, thin muscle located just under the skin. It is a thenar muscle, and therefore contributes to the bulk of the palm’s thenar eminence.

Origin :-

  • the flexor retinaculum of the hand, the tubercle of the scaphoid bone, and additionally sometimes from the tubercle of the trapezium.

Insertion :-

  • a thin, flat tendon into the lateral side of the base of the first phalanx of the thumb and the capsule of the metacarpophalangeal joint.

Nerve supply :-

  • The abductor pollicis brevis is innervated by the recurrent branch of the median nerve (Roots C5- C7 and C8-T1 in the brachial plexus lateral and medial cords respectively) .

Action :-

abductor pollicis brevis muscle action

  • Abduction of the thumb is defined as the movement of the thumb anteriorly, a direction perpendicular to the palm. The abductor pollicis brevis does this by acting across both the carpometacarpal joint and the metacarpophalangeal joint.
  • It also assists in opposition and extension of the thumb.
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Physiotherapist , Samarpan Physiotherapy Clinic, Vastral, Nirant Cross Road, Ahmedabad Home Visit Treatment Also Available in Bapunagar Vastral Rabari Colony Char Rasta, CTM, Maninagar , Viratnagar , Nikol And NearBy Area Of Ahmedabad.

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