lateral pectoral nerve

The lateral pectoral nerve is part of the brachial plexus, a network of nerves located primarily in the armpit that supplies nerves to the chest, shoulder, and arm. This nerve specifically innervates the pectoralis minor and major muscles, which are responsible for connecting the chest wall to the bones of the upper arm and shoulder. The brachial plexus itself is formed by spinal nerves from cervical levels C5–C8 and thoracic level T1, with contributions from C4 and T2. These nerves converge to form trunks, which then split into divisions and finally into cords, ultimately providing motor, sensory, and autonomic fibers to the upper extremity.123