Primary Position Upbeat Nystagmus Due to Unilateral Medial Medullary Infarction
Ann Neurol 43:403-406, Hirose,G.,et al, 1998
Convergence-Evoked Nystagmus
Neurol 40:161-162, Oliva,A.&Rosenberg,M.L., 1990
Lateropulsion & Upbeat Nystagmus are Manifestations of Central Vestibular Dysfunction
Arch Neurol 43:962-964, Benjamin,E.E.,et al, 1986
Primary Position Upbeating Nystagmus:A Variety of Central Positional Nystagmus
Brain 106:949-964, Fisher,A.,et al, 1983