Table 2

 Features of peripheral and central vestibular nystagmus

Peripheral vestibularCentral vestibular
• Combination of horizontal, vertical and torsional nystagmus• Unidirectional
• Associated with severe vertigo• Mild or no vertigo
• Quick phase beating away from the underactive labyrinth
• Amplitude increases with gaze toward the direction of quick phase• May be gaze evoked
• Notably suppressed by fixation• No change in amplitude with fixation or when fixation is removed