Table 4:

Localization of nystagmus

Nystagmus	Location
Spasmus nutans	Congenital or chiasm
Seesaw	Midbrain/parasellar region
Downbeat	Cervicomedullary junction
Periodic alternating	Cervicomedullary junction
Dissociated	Medial longitudinal fasciculus
Rebound	Cerebellum
Convergence retraction nystagmus	Dorsal midbrain
Oculopalatal myoclonus	Mollaret triangle (central tegmental tract)
Brun nystagmus	Cerebellopontine angle
Gaze evoked	Vestibular, cerebellum
Upbeat	Pontomesencephalic or pontomedullary junction and cerebellum
Torsional (pure)	Central vestibular or cerebellum