Uncontrollable shaking and muscle stiffness are characteristic of what?

The symptoms mentioned are characteristic of Parkinson's disease. Parkinson's disease is a neurodegenerative disorder that affects the central nervous system. It is characterized by progressive loss of nerve cells in the brain that produce dopamine. Dopamine is a neurotransmitter that helps control movement. As the level of dopamine decreases, people with Parkinson's disease experience a variety of symptoms, including tremors, rigidity, slowness of movement, and impaired balance.