Further complicating matters, no diagnostic test currently exists for PSP other than the clinical observation of the patient. Gizzi states that the most common early symptom of PSP is a loss of balance while walking. This may take the form of unexplained falls or an awkwardness in gait that can resemble Parkinson's disease. Other common early symptoms are forgetfulness and changes in personality, including increased irritability and a loss of interest in formerly pleasurable activities. Less common early symptoms are trouble with eyesight, slurring of speech, and mild shaking of the hands.
Difficulty driving a car, with several accidents or near misses, also occurs in the early stages.
I started to fall for no apparent reason, and I had trouble focusing properly. At first I thought it was trouble with my glasses. At the same time, Moore began to notice slight problems while playing music. I was on tour. While at the piano, I began having trouble with one finger, which just wasn't playing what I expected it to play.