Purpose of Sharp Purser Test: To determine if subluxation of the atlas on the axis vertebra is present and diagnose atlantoaxial instability (1). Patient position: Sitting. Examiner position: Standing beside the patient. Procedure: Ask the patient to perform a slight cervical retraction/nod to correct the poke chin posture. Place the palm of one hand over the patient’s forehead. Place the thumb and the index finger … Continue reading Sharp Purser Test