Degenerative Diseases of the Nervous System, Parkinson Disease
Adams & Victors Principles of Neurology, Chp 39, pg 1082, Ropper, A.H.,et al, 2014
Neurological Findings in Alzheimer's Disease and Normal Aging
Arch Neurol 47:625-627, Glasko,D.,et al, 1990
Primitive Reflexes & Cognitive Function in the Elderly
Ann Neurol 12:302-304, Koller,W.C.,et al, 1982