Which movement is the circular motion of a limb?

Which movement is the circular motion of a limb?

• A. Flexion
• B. Rotation
• C. Abduction
• D. Circumduction

Answer: (D)

Circumduction is the circular motion of a limb, created by combining several directions around a joint so the end of the limb traces a circle. This happens by moving through flexion (bending), extension (straightening), abduction (moving away from the midline), and adduction (moving toward the midline) in a coordinated way. For example, when you move your arm in a circle at the shoulder, the hand follows a circular path because the joint allows these movements together. The shoulder or hip joints, which are ball-and-socket types, enable this combination to produce that cone-shaped sweep. This differs from rotation, which is turning around the limb’s own axis, not moving the end in a circular path around the joint.

Circumduction is the circular motion of a limb, created by combining several directions around a joint so the end of the limb traces a circle. This happens by moving through flexion (bending), extension (straightening), abduction (moving away from the midline), and adduction (moving toward the midline) in a coordinated way. For example, when you move your arm in a circle at the shoulder, the hand follows a circular path because the joint allows these movements together. The shoulder or hip joints, which are ball-and-socket types, enable this combination to produce that cone-shaped sweep. This differs from rotation, which is turning around the limb’s own axis, not moving the end in a circular path around the joint.