Lateral pectoral nerve
Nerves · Latin: Nervus pectoralis lateralis
The lateral pectoral nerve (also known as the lateral anterior thoracic nerve) arises from the lateral cord of the brachial plexus, and through it from the C5-7.
It passes across the axillary artery and vein, pierces the clavipectoral (coracoclavicular) fascia, and enters the deep surface of the pectoralis major to innervate it.
Definition from Wikipedia, CC BY-SA 4.0.