Lower subscapular nerve explained

Lower subscapular nerve
Latin:	nervus subscapularis inferior
Innervates:	Subscapularis and teres major muscle
Branchfrom:	Posterior cord

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.

Structure

The lower subscapular nerve contains axons from the ventral rami of the C5 and C6 cervical spinal nerves. It is the third branch of the posterior cord of the brachial plexus. It gives branches to 2 muscles:

• subscapularis muscle. It usually gives 4 branches to innervate the subscapularis, and can give up to 8 branches.
• teres major muscle.

Function

The lower subscapular nerve innervates the subscapularis muscle and the teres major muscle. These muscles medially rotate and adduct the humerus.

References

1. 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. en. 38. 1. 176–181. 10.4067/S0717-95022020000100176. 0717-9502. free.