Adduction – movement towards the midline of the body. This occurs at the hip and shoulder, returning the arms and legs back to their original position from a jumping jack movement. Circumduction ...

While teaching his "Human Adaptation" class, Princeton University anthropology professor Alan Mann motioned with his arms and legs as he explained the evolution of human joints from earlier ...

Adduction – movement towards the midline of the body. This occurs at the hip and shoulder, returning the arms and legs back to their original position from a jumping jack movement. Circumduction ...