The lower subscapular nerve, also known as the inferior subscapular nerve,[1] is the third branch of the posterior cord of the brachial plexus. It innervates the inferior portion of the subscapularis muscle and the teres major muscle.
| Lower subscapular nerve | |
|---|---|
 Diagram of brachial plexus (label for lower subscapular nerve at bottom center) | |
| Details | |
| From | Posterior cord |
| Innervates | Subscapularis and teres major muscle |
| Identifiers | |
| Latin | nervus subscapularis inferior |
| TA2 | 6429 |
| FMA | 65307 |
| Anatomical terms of neuroanatomy | |
Structure
editThe lower subscapular nerve contains axons from the ventral rami of the C5 and C6 cervical spinal nerves.[2][3] It is the third branch of the posterior cord of the brachial plexus.[4][5] It gives branches to 2 muscles:
- subscapularis muscle.[2] It usually gives 4 branches to innervate the subscapularis, and can give up to 8 branches.[1]
- teres major muscle.[2][3]
Function
editThe lower subscapular nerve innervates the subscapularis muscle and the teres major muscle.[2] These muscles medially rotate and adduct the humerus.[3]
Additional images
edit-
Brachial plexus -
The right brachial plexus (infraclavicular portion) in the axillary fossa; viewed from below and in front. -
Brachial plexus with courses of spinal nerves shown
References
edit
This article incorporates text in the public domain from page 934 of the 20th edition of Gray's Anatomy (1918)
- ^ a b Bustamante-Aliste, P. A; Sousa-Rodrigues, C. F; Olave, E (February 2020). "Origen del Nervio Subescapular Inferior, Patrones de Ramificación y su Contribución a la Inervación del Músculo Subescapular". International Journal of Morphology. 38 (1): 176–181. doi:10.4067/S0717-95022020000100176. ISSN 0717-9502.
- ^ a b c d Rea, Paul (2015-01-01), Rea, Paul (ed.), "Chapter 2 - Upper Limb Nerve Supply", Essential Clinically Applied Anatomy of the Peripheral Nervous System in the Limbs, Academic Press, pp. 41–100, ISBN 978-0-12-803062-2, retrieved 2021-01-10
- ^ a b c Loftus, Brian D.; Athni, Sudhir S.; Cherches, Igor M. (2010-01-01), Rolak, Loren A. (ed.), "CHAPTER 2 - Clinical Neuroanatomy", Neurology Secrets (Fifth Edition), Philadelphia: Mosby, pp. 18–54, ISBN 978-0-323-05712-7, retrieved 2021-01-10
- ^ Nicole Bentley, J.; Yang, Lynda J. -S. (2015-01-01), Tubbs, R. Shane; Rizk, Elias; Shoja, Mohammadali M.; Loukas, Marios (eds.), "Chapter 42 - Anatomy of the Posterior Cord and Its Branches", Nerves and Nerve Injuries, San Diego: Academic Press, pp. 563–574, ISBN 978-0-12-410390-0, retrieved 2021-01-10
- ^ Thomas, Jared; Khan, Moin; Burrus, M. Tyrrell; Bedi, Asheesh (2018-01-01), Arciero, Robert A.; Cordasco, Frank A.; Provencher, Matthew T. (eds.), "5 - Overview", Shoulder and Elbow Injuries in Athletes, Elsevier, pp. 203–212, doi:10.1016/b978-0-323-51054-7.00005-1, ISBN 978-0-323-51054-7, retrieved 2021-01-10
