Medial pectoral nerve
|Medial pectoral nerve|
Nerves of the left upper extremity. (Medial anterior thoracicvisible in upper right.)
|Latin||nervus pectoralis medialis|
|Innervates||pectoralis minor, pectoralis major|
|Anatomical terms of neuroanatomy|
The medial pectoral nerve (medial anterior thoracic) arises from the medial cord (sometimes directly from the anterior division of the inferior trunk) of the brachial plexus and through it from the eighth cervical and first thoracic roots.
It then enters the deep surface of the pectoralis minor muscle, where it divides into a number of branches, which supply the muscle.
Two or three branches pierce the muscle and end in the sternocostal head of the pectoralis major muscle. A mnemonic to differentiate the medial pectoral nerve, which pierces both the pectoralis minor and the sternocostal head of the pectoralis major, from the lateral pectoral nerve, which pierces only the clavicular head of the pectoralis major, is "Lateral Less, Medial More".
- Anatomy photo:05:st-0511 at the SUNY Downstate Medical Center
- EatonHand ner-016
- MedEd at Loyola GrossAnatomy/dissector/practical/ue/ue15.html