Opponens polisis

Original Editor -Nikhil Benhur Abburi

Top Contributors - Nikhil Benhur Abburi and Swati Singh

Description

Opponens pollicis is a muscle of thenar eminence, it is triangular and lies deep to flexor pollicis brevis and abductor pollicis brevis

Origin

Originates from the flexor retinaculum, tubercles of scaphoid and trapezium, and abductor pollicis longus tendon.

Insertion

The radial side of the base of the proximal phalanx of the thumb

Nervepalmar

It is supplied by the median nerve (C8, T1)

Artery

It receives blood supply from the superficial arch

Function

Rotates thumb into opposition with fingers

Assessment

it is tested with the forearm in supination, wrist in neutral, thumb in adduction with MP and IP joints in flexion and instruct the patient to bring his/her thumb to the little finger and touch the two pads, forming the letter 'O' with thumb and little finger