Pollicis longus muscle

Pollicis Longus Muscle

The Pollicis Longus Muscle (highlighted in red)

The Pollicis Longus Muscle is a skeletal muscle located in the forearm that plays a crucial role in thumb movement. It is one of the three muscles that make up the anterior compartment of the forearm.

Anatomy

The Pollicis Longus Muscle originates from the middle third of the anterior surface of the radius and the adjacent interosseous membrane. It runs down the forearm, crosses the wrist joint, and inserts into the base of the first metacarpal bone.

Function

The primary function of the Pollicis Longus Muscle is to flex and abduct the thumb at the carpometacarpal joint. This muscle also assists in flexion and abduction of the wrist.

Clinical Significance

Damage to the Pollicis Longus Muscle can result in a loss of thumb movement, affecting the ability to grip and manipulate objects. Conditions such as De Quervain's Tenosynovitis can cause pain and swelling in the Pollicis Longus Muscle.

See Also

• Flexor Pollicis Longus Muscle
• Extensor Pollicis Brevis Muscle
• Extensor Pollicis Longus Muscle