Opponens pollicis

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Opponens pollicis
Opponens pollicis.GIF
Note: trans. carpal ligament = flexor retinaculum
System: Muscle
Function: Opposition of the thumb
Origin: Flexor retinaculum and tubercle of trapezium
Insertion: Lateral border of thumb metacarpal
Arterial supply:
Venous drainage:
Lymphatic drainage:
Innervation: Recurrent branch of the median nerve (C8, T1)
Vertebral levels:
Search for Opponens pollicis in Gray's.

Opponens pollicis is a small muscle of the thenar eminence which allows opposition of the thumb



A small triangular muscle, opponens pollicis runs beneath abductor pollicis brevis within the thenar eminence, passing distolaterally to its insertion.

The Opponens pollicis is a small, triangular muscle, placed beneath Abductor pollicis brevis. It arises from the ridge on the greater multangular and from the transverse carpal ligament, passes downward and lateralward, and is inserted into the whole length of the metacarpal bone of the thumb on its radial side


Opposition of the thumb through the following:

Joints Affected



Nerve Supply


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