Opponens polisis

Original Editor -Nikhil Benhur Abburi

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Description[edit | edit source]

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

Origin[edit | edit source]

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

1024px-1121 Intrinsic Muscles of the Hand Deep LD.png


1024px-1121 Intrinsic Muscles of the Hand Superficial sin.png


Insertion[edit | edit source]

Radial side of the base of proximal phalanx of thumb

Nervepalmar[edit | edit source]

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

Artery[edit | edit source]

It receives blood supply from superficial arch

Function[edit | edit source]

Rotates thumb into opposition with fingers

Assessment[edit | edit source]

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

Resources[edit | edit source]