Shoulder motion in the sagittal plane is reciprocal with which joint?

Shoulder motion in the sagittal plane is reciprocal with which joint?

• A. Hip
• B. Knee
• C. Subtalar joint
• D. Talocrural joint

Answer: (A)

Coordination of upper and lower limbs in the sagittal plane is the key idea. In this plane, shoulder movement (flexion and extension) is tightly linked to hip movement, forming a reciprocal pattern that helps maintain balance and forward progression during activities like walking. The hip acts as the primary partner because its sagittal-plane motion drives or mirrors the arm swing, keeping the trunk stable and the body's momentum coordinated. The knee and ankle joints (including the subtalar and talocrural joints) participate in gait, but they are not the primary reciprocal counterpart to shoulder motion in the sagittal plane.

Coordination of upper and lower limbs in the sagittal plane is the key idea. In this plane, shoulder movement (flexion and extension) is tightly linked to hip movement, forming a reciprocal pattern that helps maintain balance and forward progression during activities like walking. The hip acts as the primary partner because its sagittal-plane motion drives or mirrors the arm swing, keeping the trunk stable and the body's momentum coordinated. The knee and ankle joints (including the subtalar and talocrural joints) participate in gait, but they are not the primary reciprocal counterpart to shoulder motion in the sagittal plane.