Bilateral Thalamic Lesions
AJR 192:W53-W62, Smith,A.B.,et al, 2009
Primary Position Upbeating Nystagmus:A Variety of Central Positional Nystagmus
Brain 106:949-964, Fisher,A.,et al, 1983
Bilateral Sixth Nerve Palsy
Arch Neurol 33:681, Keane,J.R., 1976