What is the origin of the teres major muscle?

The teres major muscle originates from the inferior posterior angle of the scapula. This origin is crucial because it allows the muscle to play a significant role in shoulder movements, particularly in actions such as adduction and internal rotation of the humerus. The location on the scapula provides a stable base, enabling the muscle to exert force effectively on the humerus during various upper body activities.

Understanding the teres major's origin is essential for recognizing its function in relation to other muscles around the shoulder girdle. Delving into the other options highlights their anatomical relevance. The SPs of C7 - T12 refer to spinal processes, associated more with back muscles like the latissimus dorsi. The lesser trochanter of the femur is the origin for the iliopsoas muscle, crucial for hip flexion, while ribs 1 - 9 relate primarily to muscles involved in respiration or movement of the thoracic area.

Recognizing the specific anatomical origins of muscles like the teres major is fundamental in sports massage practice, as it helps in understanding muscle mechanics and potential injury sites as well as effective treatment strategies.