Question

Which of the following statements is true regarding external rotation of the shoulder?

1) It is a movement that occurs in the transverse plane
2) It is a movement that occurs in the sagittal plane
3) It is a movement that occurs in the frontal plane
4) It is a movement that occurs in the coronal plane

Answer 1

External rotation of the shoulder is a movement that occurs in the transverse plane, where the anterior surface of the limb moves away from the midline of the body.

Step-by-step explanation:

The statement that is true regarding external rotation of the shoulder is: 1) It is a movement that occurs in the transverse plane.

External rotation refers to the rotational movement at the ball-and-socket joints of the shoulder and hip, where the humerus (at the shoulder) and femur (at the hip) rotate around their long axis.

This rotation moves the anterior surface of the limb away from the midline of the body, which is lateral or external rotation.

This action is distinct from movements that occur in the sagittal plane (such as flexion and extension), the frontal plane (such as abduction and adduction), and the coronal plane (same as the frontal plane).