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Origin Flexor retinaculum and tubercles of scaphoid and trapezium
Insertion Lateral side of base of proximal phalanx of thumb
Action Abducts thumb and helps oppose it
Innervation Recurrent branch of median nerve (C8 and T1) (C8, T1)
Arterial Supply Superficial palmar branch of the radial artery

 

 

 

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