Which side is specified as involved in the example's rib and vertebral rotation?

Which side is specified as involved in the example's rib and vertebral rotation?

• A. Right
• B. Left
• C. Both
• D. Neither

Answer: (A)

Rib and vertebral rotation are described by the direction the rotation moves toward. If the rib’s angle and the attached vertebra rotate toward the right, that tells you the right side is involved. In the example, the motion is described or depicted as proceeding to the right, so the right side is the engaged side. The left would be involved only if the rotation were toward the left, and both or neither would imply a different motion pattern. So the right side is the side specified by the example’s rib and vertebral rotation.

Rib and vertebral rotation are described by the direction the rotation moves toward. If the rib’s angle and the attached vertebra rotate toward the right, that tells you the right side is involved. In the example, the motion is described or depicted as proceeding to the right, so the right side is the engaged side. The left would be involved only if the rotation were toward the left, and both or neither would imply a different motion pattern. So the right side is the side specified by the example’s rib and vertebral rotation.