Latissimus dorsi:

latissimus dorsi , widest and most powerful muscle of the back. It is a large, flat, triangular muscle covering the lower back. It arises from the lower half of the vertebral column and iliac crest (hipbone) and tapers to a rounded tendon inserted at (attached to) the front of the upper part of the humerus (upper-arm bone). The latissimus dorsi muscle is a member of the superficial layer of the extrinsic back muscles , along with the levator scapulae, trapezius, and rhomboid muscles. The latissimus dorsi muscle is one of the scapular motion muscles, so it serves a functional purpose. The latissimus dorsi , commonly known as the "lats," is one of the largest muscles in the upper body and is important for various shoulder and arm movements, particularly in pulling actions. A strain of this muscle can significantly impact daily activities and athletic performance. Let’s discuss the causes, symptoms, and rehabilitation of latissimus dorsi muscle strains. Learn about the anatomy, function, and variations of the latissimus dorsi , a large, flat muscle on the back that stretches to the sides and behind the arm. The latissimus dorsi is involved in extension, adduction, internal rotation, and trunk movement of the shoulder joint.