Which term describes movement toward a line perpendicular to the midline, known as horizontal adduction?

Which term describes movement toward a line perpendicular to the midline, known as horizontal adduction?

• A. Abduction
• B. Horizontal Adduction
• C. Adduction
• D. Rotation

Answer: (B)

Moving toward the body's midline in the horizontal direction is called horizontal adduction. This describes adduction that occurs in the horizontal plane, so the limb slides toward the midline rather than up or down. A common example is bringing the arm across the chest from shoulder level toward the midline. This contrasts with horizontal abduction, which would move the limb away from the midline in the same horizontal plane. Adduction in other planes isn’t specified as horizontal, and rotation involves turning around a joint axis rather than moving toward or away from the midline.

Moving toward the body's midline in the horizontal direction is called horizontal adduction. This describes adduction that occurs in the horizontal plane, so the limb slides toward the midline rather than up or down. A common example is bringing the arm across the chest from shoulder level toward the midline. This contrasts with horizontal abduction, which would move the limb away from the midline in the same horizontal plane. Adduction in other planes isn’t specified as horizontal, and rotation involves turning around a joint axis rather than moving toward or away from the midline.