Why isn't the Teres Major included in the rotator cuff muscle group? Also, is there a specific name for movement at a 45-degree angle in terms of anatomical planes?

Support Team Updated by Support Team

The rotator cuff is comprised of four muscles: the supraspinatus, infraspinatus, teres minor, and subscapularis. Their primary roles are to stabilize and move the humeral head within the glenoid fossa of the scapula. While the teres major is anatomically close to the rotator cuff muscles, its function is different. The teres major helps with the adduction and medial rotation of the arm and does not play a significant role in stabilizing the humeral head.

Regarding movement at a 45-degree angle, in anatomical terms, when movement occurs that isn't strictly in one of the primary planes (sagittal, frontal, or transverse), it's typically described as occurring in an oblique plane. However, specifying the exact angle of the movement in relation to the primary planes can offer more clarity.

How did we do?

Is jumping considered movement in the transverse plane? Additionally, in which plane does stepping to the left or right occur?

Is the concept of spinal flexion and extension, where flexion brings vertebrae closer and extension moves them apart, based on a frontal view of the spine?

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