Final answer:
True, the Teres Minor muscle both laterally rotates and stabilizes the humerus as part of the rotator cuff.
Step-by-step explanation:
The statement regarding the Teres Minor muscle is True: the Teres Minor indeed laterally rotates the humerus and helps to stabilize the humerus. The Teres Minor is one of the four muscles that make up the rotator cuff (musculotendinous cuff). It originates on the Infraglenoid tubercle of the scapula and inserts on the posterior shaft of the humerus just distal to the radial groove. By serving as a lateral rotator, it allows rotation of the humerus so that the anterior surface moves away from the midline of the body, which is a motion distinct from medial (internal) rotation. Additionally, the tendons of the Teres Minor contribute to the stability of the shoulder joint by forming part of the rotator cuff, preventing dislocation and providing structural support for arm movements.