John is 63 years old and receives home care by an occupational therapist twice a week

John is 63 years old and receives home care by an occupational therapist twice a week. His therapist is currently working with John on maintaining joint flexibility and balance. John demonstrates resting tremor, so his therapist is also working on adaptive techniques, so John can continue to use his hands to write, use the computer, and cook simple meals. John’s wife assists with his mobility and walks slowly beside him, holding his arm. Sometimes she needs to help him open his prescription bottles, so he can take his medicine, a combination of levodopa and carbidopa.

Tasks

1. Please address the following:
   • What motor disease does John demonstrate?
   • One of his signs is resting tremor. What is the difference between a resting tremor and an intention tremor?
   • Parkinson disease involves the destruction of the substantia nigra and the nigrostriatal pathway. Where are these structures anatomically?
   • The client with Parkinson disease typically presents with a masklike facial expression. Why does he or she have a masklike facial expression?
   • How are the eyes, mouth, and laryngopharynx affected by this disease?

Explain in detail with references