opponens

The opponens pollicis is a small, triangular muscle in the hand, which functions to oppose the thumb.

The opponens pollicis receives its blood supply from the Superficial palmar arch.

It ends in the opponens pollicis.

It is caused by damage to the proximal median nerve, and subsequent loss of opponens pollicus muscle function.

Opponens can refer to:

The opponens pollicis originates on the tubercle of the trapezium and the flexor retinaculum.

Like the other thenar muscles, the opponens pollicis is innervated by the recurrent branch of the median nerve.

The opponens pollicis causes the thumb to flex and rotate medially, leaving the thumb unable to oppose.

It can occur with an injury of the median nerve either at the elbow or the wrist, impairing the thenar muscles and opponens pollicis muscle.

The human thumb also has other muscles in the thenar group (opponens and abductor brevis muscle), moving the thumb in opposition, making grasping possible.

The median nerve innervates the flexors of the wrist and digits, the abductors and opponens of the thumb, the first and second lumbrical.

Here it provides motor innervation to opponens pollicis, abductor pollicis brevis and flexor pollicis brevis.

In a Cannieu-Riche anastomasis, fibers from the deep palmar branch of the ulnar nerve innervate the opponens pollicis and/or abductor pollicis brevis.

The opponens digiti minimi (opponens digiti quinti in older texts) is a muscle in the hand.

To anatomists, this makes sense as two intrinsic hand muscles are named for this specific movement (the opponens pollicis and opponens digiti minimi respectively).

The opponens digiti minimi originates from the long plantar ligament and the plantar tendinous sheath of peroneus longus and is inserted on the fifth metatarsal.

Flexion of this joint is produced by the flexor pollicis longus and brevis, assisted by the opponens pollicis and the adductor pollicis.

The oblique opponens digiti minimi muscle acts on the fifth CMC joint and is the only muscle that act on the CMC joints alone.

The palmar (medial) surface exhibit a blunt ridge which separates a larger lateral part - the origin of the opponens pollicis muscle - and a smaller medial part - the origin of the lateral head of the first dorsal interosseous muscle.