Anatomy
Origin:
Superficial part: Flexor retinaculum and tubercle of the trapezium.
Deep part: Trapezoid and capitates.
Insertion:
Base of the proximal phalanx of thumb.
Key Relations:
Is one of the muscles of the thenar eminence of the hand.
Functions
Flexion of the thumb at the metacarpophalangeal joint.
Supply
Nerve Supply:
Superficial part: Recurrent branch of median nerve (C8, T1)
Deep part: Ulnar nerve
Blood supply:
Superficial palmar branch of radial artery.
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