Abductor Pollicis Brevis

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The Abductor Pollicis Brevis is a muscle of the hand.

Anatomical Attachments:

• Origin: Attaches to the Transverse carpal ligament, and the scaphoid and the trapezium bones.
• Insertion: Attaches to the base of the distal phalanx of the thumb.

Action: Abducts the thumb and pulls it forward at a right angle to the palm.

Synergist: Flexor pollicis brevis, Opponens pollicis, and Adductor pollicis.

Antagonist: Palmaris brevis, Abductor digiti minimi, Flexor digiti minimi brevis, Opponens digiti minimi.

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Nerve Supply: Median Nerve (C6, C7).

Vascular supply: Superficial volar branch of the radial artery.

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