The characteristic signs and symptoms of progressive supranuclear palsy include:  A loss of balance while walking. A tendency to fall backward can occur very early in the disease. An inability to aim your eyes properly. You may not be able to look downward, or experience blurring and double vision. This difficulty with focusing the eyes can make some people spill food or appear disinterested in conversation because of poor eye contact.  Additional signs and symptoms of progressive supranuclear palsy vary and may mimic those of Parkinson's disease and dementia. They generally get worse over time and may include:  Stiffness (especially of the neck) and awkward movements Falling, especially falling backward Slow or slurred speech Problems with swallowing, which may cause gagging or choking Sensitivity to bright light Sleep disturbances Loss of interest in pleasurable activities Impulsive behavior, or laughing or crying for no reason Difficulties with reasoning, problem-solving and decision-making Depression and anxiety A surprised or frightened facial expression, resulting from rigid facial muscles Dizziness 
characteristic signs symptoms progressive supranuclear palsy include:  loss balance walking  tendency fall backward can occur early disease  inability aim eyes properly  may able look downward  experience blurring double vision  difficulty focusing eyes can people spill food disinterested conversation poor eye contact   additional signs symptoms progressive supranuclear palsy vary may mimic parkinson's disease dementia  generally worse time may include:  stiffness (especially neck) awkward movements falling  especially falling backward slow slurred speech problems swallowing  may cause gagging choking sensitivity bright light sleep disturbances loss interest pleasurable activities impulsive behavior  laughing crying reason difficulties reasoning  problem-solving decision-making depression anxiety surprised frightened facial expression  resulting rigid facial muscles dizziness 
progressive supranuclear palsy