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30 paź 2023 · Extensor pollicis longus originates from the middle third of the posterior surface of ulna, mostly along its radial border. This attachment extends onto the adjacent interosseous membrane, and is situated proximal to the origin of extensor indicis muscle.
- Deep Posterior Forearm Muscles
Deep posterior forearm muscles The deep posterior forearm...
- Anatomical Snuffbox
Anatomical snuffbox location, anatomy and borders. From...
- Extensor Pollicis Brevis
Extensor pollicis brevis originates from the posterior...
- Extensor Carpi Radialis Longus
Extensor carpi radialis longus primarily acts on the wrist...
- Extensor Carpi Radialis Brevis
Its tendon courses deep to abductor pollicis and extensor...
- Abductor Pollicis Longus
Abductor pollicis longus originates from the posterior...
- Abductor Pollicis Brevis
Abductor pollicis brevis originates from several locations....
- Extensor Indicis
Extensor indicis is a narrow muscle that originates mainly...
- Deep Posterior Forearm Muscles
In human anatomy, the extensor pollicis longus muscle (EPL) is a skeletal muscle located dorsally on the forearm. It is much larger than the extensor pollicis brevis, the origin of which it partly covers and acts to stretch the thumb together with this muscle.
Origin. The extensor pollicis longus muscle originates from the: - posterior surface of middle one third of the body of ulna, which is located inferior to the origin site of the abductor pollicis longus muscle; - adjacent interosseous membrane of forearm.
Extensor pollicis longus (EPL) is a long muscle located at the deep layer with extensor pollicis brevis, abductor pollicis longus, extensor indicis, and supinator muscle in the posterior compartment of the forearm. [1] It originates from the mid-third of the ulna, and interosseous membrane then courses down to the distal phalanx of the thumb.
The Extensor pollicis longus (Extensor secundi internodii pollicis) is much larger than the preceding muscle, the origin of which it partly covers. It arises from the lateral part of the middle third of the dorsal surface of the body of the ulna below the origin of the Abductor pollicis longus, and from the interosseous membrane.
8 maj 2023 · Summary. origin: posterior surface of the middle 1/3 of the ulna and interosseous membrane. insertion: posterior surface of the base of the distal phalanx of thumb. innervation: posterior interosseous nerve (C7 and C8), a continuation of the deep branch of the radial nerve (C7, C8) arterial supply: anterior and posterior interosseous arteries.
21 gru 2022 · Patients have an extra muscle named the extensor pollicis and indicis communis, which originates on the ulna between the extensor pollicis longus and extensor indicis. The muscle splits 2 slips, 1 which courses alongside the EPL on the thumb and the extensor indicis on the index finger.
