Little lat is the nickname for the teres major. It got the nickname due to how close it is to the latissimus dorsi.
The teres major muscle functions in both adduction and medial rotation of the humerus. The antagonists of this muscle are those which abduct the humerus and rotate it externally. The infraspinatus, posterior deltoid, and teres minor all function as antagonists of the teres major.
The muscle of the pectoralis is antagonist to the latissimus dorsi during the shoulder adduction. The anterior fibers are involved in shoulder abduction when the shoulder is externally rotated.
The teres major muscle is considered to be antagonistic to the teres minor muscle. The teres major muscle is a larger muscle located in the upper arm that works to extend, medially rotate, and adduct the arm, while the teres minor muscle is a smaller muscle that works to laterally rotate the arm.
Teres Major
Latissimus dorsi
Teres major muscle
lattimus dorsi. teres major, teres minor, Biceps, anterior deltoids.
The main function of the teres major is its assistance with the movement of the humerus. It helps with the downward and backward movement of this and it also stabilizes the humeral head in the glenoid cavity.
Teres major
There are many different types of movements of the shoulder joint and each movement requires the cooperation of muscles that attach to the scapula. The muscles involved are: Levator scapulae, Rhomboid Major, Rhomboid Minor, Latissimus dorsi, Trapezius, Deltoid, Supraspinatus, Infraspinatus, Teres Minor, Teres Major, and Subscapularis.
Teres Major originates on the dorsal aspect of the inferior angle of the scapula and inserts on the medial lip of the intertubercular groove of the humerus. Teres Major can internally rotate and adduct the arm.
In clams, it's used to open and close the shell.