Progressive Supranuclear Palsy: A Current Review
The Neurologist 14:79-88, Lubarsky,M. &Juncos,J.L., 2008
Selective Paralysis of Downward Gaze Caused by Bilateral Lesions of the Mesencephalic Periaqueductal Gray Matter
Neurol 35:516-521, Jacobs,L.,et al, 1985
Failure of Downward Gaze
Arch Neurol 35:22, Halmagyi,G.M.,et al, 1978