Lateral Pectoral Nerve - Podcast Version TeachMeAnatomy 0:00 / 0:00 1x 0.25x 0.5x 0.75x 1x 1.25x 1.5x 1.75x 2x The lateral pectoral nerve is a motor nerve arising from the lateral cord of the brachial plexus. It supplies motor innervation to the pectoralis major and contributes to the innervation of pectoralis minor. Pro Feature - 3D Model You've Discovered a Pro Feature Access our 3D Model Library Explore, cut, dissect, annotate and manipulate our 3D models to visualise anatomy in a dynamic, interactive way. Learn More Course The lateral pectoral nerve originates from the lateral cord of the brachial plexus, containing fibres from C5-7. It first passes anterior to the axillary artery. Here, it commonly gives rise to a communicating branch which joins the medial pectoral nerve – forming the ansa pectoralis. It then pieces the costocoracoid membrane, before terminating at the deep surface of the pectoralis major muscle. By TeachMeSeries Ltd (2025) Fig 1Medial and lateral pectoral nerves. Pro Feature - Dissection Atlas You've Discovered a Pro Feature Access our Dissection Image Library Enhance your understanding with high-resolution dissection images showcasing real-life anatomy. Learn More Motor Functions The lateral pectoral nerve provides motor innervation to the pectoralis major. It also contributes to the innervation of the pectoralis minor muscle via the ansa pectoralis. By TeachMeSeries Ltd (2025) Fig 2The sternal and clavicular heads of the pectoralis major. By TeachMeSeries Ltd (2025) Fig 3The serratus anterior and pectoralis minor muscles. Rate This Article