It’s not just a movement disorder. Besides causing tremors and other motion-related symptoms, Parkinson’s disease affects memory, learning, and behavior.

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Impulse control disorders are a class of psychiatric disorders that are loosely defined by severe impulsivity. They may also be thought of as disorders that involve the inability to control one’s short-term impulses in pursuit of a larger, future goal. Examples of impulse disorders include pathological gambling, kleptomania (compulsive stealing), hoarding of useless objects, and compulsive eating.

While the cause of many impulse control disorders is unknown, some patients taking dopamine-related medications for Parkinson’s disease begin to develop impulse control disorders – even as the medications may ameliorate the motor symptoms associated with the disease.