• Symptoms of Parkinson's disease

  • Motor symptoms
  • Non-motor symptoms
  • Constipation
  • Sweating
  • Pain
  • Speech and facial expression
  • Sleep and fatigue
  • Sense of smell
  • Mood and behaviour
  • Apathy
  • Anxiety
  • Thought and memory

• Treatment Options

• PD: What you need to know

Thought and memory

Because PD affects more than one part of the brain, some people find that they experience changes in thought and memory, in addition to the more common movement-related symptoms.

In early PD, these changes may include difficulty with concentration, or subtle changes in memory and thinking – often barely noticeable to the person with PD. The ability to plan complex tasks or perform several tasks at once may also be affected. These impairments may gradually progress along with other symptoms of the disease, although it should be noted that medications can also have an effect on thought processes (e.g., producing confusion or hallucinations), and so any changes should be reported to a doctor as soon as possible in order to determine the cause.