Lateral Thoracic Artery - Podcast Version 0:00 / 0:00 1x 0.25x 0.5x 0.75x 1x 1.25x 1.5x 1.75x 2x The lateral thoracic artery (long thoracic artery) is a branch of the axillary artery. It supplies several structures in the axilla and anterior thoracic wall. Course The lateral thoracic artery originates from the 2nd part of the axillary artery (posterior to pectoralis minor). It courses vertically downward along the lateral border of the pectoralis minor muscle. Along its course, it provides several small branches that supply various structures within the axilla and anterior thoracic wall. It usually terminates at the level of the fifth intercostal space and forms an anastomosis with the internal thoracic artery. Adobe Stock, Licensed to TeachMeSeries Ltd Fig 1Anatomical course of the lateral thoracic artery Supply The lateral thoracic artery supplies the following structures: Axillary lymph nodes Breasts Skin of lateral thoracic wall Serratus anterior muscle Pectoralis major muscle Pectoralis minor muscle Subscapularis muscle 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 Frequent questions What is the lateral thoracic artery? The lateral thoracic artery is a branch of the axillary artery that supplies structures in the axilla and anterior thoracic wall. It originates from the axillary artery and descends along the lateral border of the pectoralis minor muscle. What structures are supplied by the lateral thoracic artery? The lateral thoracic artery supplies the axillary lymph nodes, breasts, skin of the lateral thoracic wall, and muscles including the serratus anterior, pectoralis major, pectoralis minor, and subscapularis. These supplies are crucial for the functioning of the upper thoracic region. Where does the lateral thoracic artery originate? The lateral thoracic artery originates from the second part of the axillary artery, located posterior to the pectoralis minor muscle. This anatomical position is significant for understanding its course and branches. What is the course of the lateral thoracic artery? The lateral thoracic artery courses vertically downward along the lateral border of the pectoralis minor muscle. It typically terminates at the fifth intercostal space, where it forms an anastomosis with the internal thoracic artery. Why is the lateral thoracic artery clinically relevant? The lateral thoracic artery is clinically relevant due to its supply to important structures such as the breast and axillary lymph nodes. Understanding its anatomy is essential for surgical procedures in the axillary region and for managing conditions affecting these areas. Rate This Article