Actor michael j. fox announced that he was leaving his hit show spin city because he had parkinson's disease and wanted to spend more time with his family. the reason for his disorder is a(n): loss of dopamine. loss of acetylcholine. overproduction of dopamine. overproduction of acetylcholine.

The reason die his disorder is a "loss of dopamine".

Dopamine is a chemical which is found naturally in the human body and is a neurotransmitter, which means it sends signals from the body to the mind.  

Dopamine has an impact in controlling the developments a man makes, and in addition their passionate reactions. The correct parity of dopamine is fundamental for both physical and mental prosperity.  

Vital brain functions that influence temperament, rest, memory, learning, fixation, and engine control are impacted by the levels of dopamine in a man's body. A dopamine deficiency might be identified with certain restorative conditions, including dejection and Parkinson's disease.

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could you go a bit more in depth with you question? it's quite hard to understand. as soon as you do that i will be glad to : )