Which term describes inward rotation of a limb?

Which term describes inward rotation of a limb?

• A. Abduction
• B. Extension
• C. Adduction
• D. Internal rotation

Answer: (D)

Internal rotation is the movement that twists a limb toward the midline of the body by rotating around its long axis. This makes the front surface of the limb turn inward. For example, rotating the humerus (upper arm) so the palm faces your body or rotating the femur (thigh) so the knee turns inward illustrates internal (medial) rotation. Abduction describes moving a limb away from the midline, not twisting it. Extension refers to straightening a joint (increasing the angle). Adduction means moving a limb toward the midline without rotating it around its axis. So, inward rotation specifically refers to the rotational movement toward the body's center, not simply moving toward the midline.

Internal rotation is the movement that twists a limb toward the midline of the body by rotating around its long axis. This makes the front surface of the limb turn inward. For example, rotating the humerus (upper arm) so the palm faces your body or rotating the femur (thigh) so the knee turns inward illustrates internal (medial) rotation.

Abduction describes moving a limb away from the midline, not twisting it. Extension refers to straightening a joint (increasing the angle). Adduction means moving a limb toward the midline without rotating it around its axis. So, inward rotation specifically refers to the rotational movement toward the body's center, not simply moving toward the midline.