Laughter may not be a cure for Parkinson's but it has much to offer on several levels to help the patients by calming and reassuring, and improving their quality of life. People usually suffer from confusion and frustration, giving rise to negative feelings and anxiety, which often lead to behavioral problems and even aggression. Laughter has the ability to ease these symptoms, and activate happy hormones. When you laugh out loud, the body manufactures dopamine, which is the cheapest pill available because it is free!
Here is an interesting story of a student of Laughter Yoga who lost his voice because of Parkinson, but practicing laughter for 10 minutes for 10 days gave him back his voice. This is what he had to say: I used to love to sing in church, but Parkinson's robbed me of my voice. I stopped singing because I could not hear myself. Do you know that after laughing once a day I could hear myself again in church. This is the magic of laughter!