Extensor pollicis longus muscle
| Extensor pollicis longus muscle |
|---|
|
| origin |
| Posterior aspect of the ulna , interosseous membrane |
| approach |
| Terminal of the thumb |
| function |
| Extensor of the thumb |
| Innervation |
| Radial nerve from the brachial plexus |
| Spinal segments |
| C7, C8 |
The extensor pollicis longus muscle ( Latin for "long thumb extensor") is a skeletal muscle and one of the deep extensors on the forearm . It is larger than the extensor pollicis brevis muscle , the origin of which it partially covers.
The extensor pollicis longus muscle extends the thumb to the extremity. The insertion tendon of the muscle passes through the third tendon sheath of the extensor retinaculum and forms the ulnar border of the snuffbox . When the tendon ruptures, so-called drum paralysis occurs .
Individual evidence
- ↑ a b Michael Schünke, Erik Schulte, Udo Schumacher: Prometheus - LernAtlas der Anatomie. General anatomy and motor system. 4th edition, Thieme, Stuttgart 2015, ISBN 978-3-13-139524-5 , pp. 320–321.
- ↑ Gerhard Aumüller et al .: Dual series of anatomy. 2nd edition, Thieme, Stuttgart 2010, ISBN 978-3-13-136042-7 , p. 451.
- ↑ Gerhard Aumüller et al .: Dual series of anatomy. 2nd edition, Thieme, Stuttgart 2010, ISBN 978-3-13-136042-7 , p. 461.
- ↑ Volker Bühren, Marius Keel, Ingo Marzi (eds.): Checklist Traumatology. 8th edition, Thieme, Stuttgart 2016, ISBN 978-3-13-598108-6 , p. 520.