Table I.

Secondary signs of lateralization before geotropization.

	Pseudo-spontaneus nystagmus	Leaning nystagmus	Bowing nystagmus	HSIN	Sitting to supine nystagmus
Patient 1	Right	Right	Left	Left	Right
Patient 2	Right	Right	Left	Absent	Right
Patient 3	Absent	Absent	Absent	Right	Left
Patient 4	Left	Left	Left	Absent	Left
Patient 5	Absent	Right	Left	Absent	Right

HSIN: Head shaking induced nystagmus