For measuring cervical lateral flexion, which setup is correct for patient position, stabilization, and goniometer placement?

• A. Position: sitting; Stabilize: shoulder to limit thoracic side bending; Fulcrum: spinous process of the C7 vertebra; Stationary Arm: spinous process of the thoracic vertebra so the arm is perpendicular to the ground; Moving Arm: dorsal midline of the head, using occipital protuberance for reference
• B. Position: sitting; Stabilize: scapula to prevent upward rotation; Fulcrum: spinous process of C7; Stationary Arm: spinous process of the thoracic vertebra; Moving Arm: occipital protuberance
• C. Position: standing; Stabilize: neck to limit lateral flexion; Fulcrum: spinous process of C6; Stationary Arm: thoracic spinous process; Moving Arm: temple
• D. Position: prone; Stabilize: neck to limit movement; Fulcrum: C5 spinous; Stationary Arm: along spine; Moving Arm: skull

Answer: (A)

Isolating movement to the cervical spine and preventing compensations from the trunk is the core idea when measuring cervical lateral flexion with a goniometer. The best setup does this by using reliable palpation landmarks and a stable reference frame.

Have the patient seated and relaxed, with the shoulder girdle stabilized so the thorax doesn’t side-bend or translate as the head moves. Place the fulcrum at the spinous process of C7 so the joint motion you capture comes from the upper cervical spine rather than the thoracic region. Align the stationary arm with the thoracic spinous processes—the line along the midline of the spine—so it points vertical and provides a consistent reference. The moving arm should follow the dorsal midline of the head, using the occipital protuberance as the landmark to track head position as it laterally flexes. This combination keeps the measurement anchored to cervical motion, gives a stable, reproducible reference, and minimizes trunk contributions.

Other setups can loosen the measurement by allowing shoulder or trunk motion, by using less precise head landmarks, or by placing the patient in positions (standing or prone) that invite compensatory movements, which is why they’re not as appropriate here.