What are the symptoms of parkinson's disease?

Several.: Parkinson's is a degenerative disorder of the central nervous system. The motor symptoms of Parkinson's disease result from the death of dopamine-generating cells in the substantia nigra. Early in the course of the disease, the symptoms are movement-related; these include shaking, rigidity, slowness of movement and difficulty with walking and gait. Later, cognition, demenentia and depression occur.

Further Detail: Physical symptoms can include tremor of limbs at rest>in posture or in action; slow movements & stiff (rigid) muscles causing quiet facial emotions, softer voice, bent forward head & neck posture, decreased arm swing, slow-shuffled walk, small/scratchy penmanship, etc. Non-physical symptoms can include cognitive decline, depression, anxiety, sleepiness, constipation, ed, low bp, acting-out dreams.