Your father should continue following his neurologist's treatment plan, as Parkinson's disease management requires regular monitoring and medication adjustments. Supportive care, such as physical therapy, exercise, and a balanced diet, can also help improve mobility and quality of life.

Unnoticed finger shaking while holding objects may be an early sign of tremor, but it does not always indicate Parkinson's disease. A neurologist diagnoses based on medical history, physical and neurological exams, and, when indicated, imaging or lab tests to rule out other causes.