Opponens polisis

Original Editor -Nikhil Benhur Abburi

Top Contributors - Nikhil Benhur Abburi


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


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



Radial side of the base of proximal phalanx of thumb


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


It receives blood supply from superficial arch


Rotates thumb into opposition with fingers


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


  1. By CFCF - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=44236045
  2. By CFCF - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=44236044