Fig. 6-10. Technique for testing macula-otolith apparatus (Nylan-Barany or Hall Pike maneuver) and rotary nystagmus elicited in patients with abnormal apparatus. The patient should be dropped from the sitting position to his head hanging in each of three positions: head to the right, head to the left and head facing straight up. As a rule, nystagmus is best elicited with the head turned toward the abnormal side and less intensively in the head straight up position.