There is a common, unfunny, and overused joke about not playing poker with people who have Parkinson’s disease because many of us have reduced facial movement and it can be hard to read our expressions.

Dealing and Healing with Parkinson's Disease by author Karl Robb
There is a common, unfunny, and overused joke about not playing poker with people who have Parkinson’s disease because many of us have reduced facial movement and it can be hard to read our expressions.