7. Parkinson's disease causes

in the hands.

Causes hands to shake/tremble

Explanation:

Parkinson's disease tremors often start in the fingers or hands with what's called a pill-rolling motion. Imagine holding a pill between your thumb and index finger and rolling it back and forth. Parkinson's tremors are slow and continuous. They aren't random tics or spasms (they are rhythmic). Parkinson's tremors happen when your muscles are still. They go away when you move. They also lessen while you sleep. For example, if you're sitting in a chair with your arm relaxed, you may notice that your fingers twitch. But if you're using your hand, like when you shake someone else's hand, the tremor eases or stops.