Lower subscapular nerve

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 [edit on Wikidata]

Structure

The 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

The lower subscapular nerve innervates the subscapularis muscle and the teres major muscle.^[2] These muscles medially rotate and adduct the humerus.^[3]

Additional images

• 
  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