Collective Insights on Collective Impact. Sponsored and curated by the Collective Impact Forum, Collective Insights on Collective Impact, which appears in Stanford Social Innovation Review's fall issue, shares cutting-edge...
Essential tremor is a neurological disorder that causes the hands, head, trunk, voice, or legs to shake rhythmically. It is often confused with Parkinsonâs disease. The cause of essential tremor is unknown, but for most people who have it, the condition seems to run in their family.
PARKINSON DISEASE CAUSE. The cause of Parkinson disease is not known. Normally, certain nerve cells (neurons) in the brain make a chemical called dopamine, which helps to control movement. In people with PD, these neurons slowly degenerate and lose their ability to produce dopamine.owever, the tremor of PD usually does not affect the head. The majority of people with Parkinson disease will notice a tremor at some point in the disease, though some do not. The side of the body that is first affected by the tremor also tends to be more severely affected throughout the course of the disease.