What Is Parkinson’s?

For more information on Parkinson’s disease, visit Info Centre Parkinson.

Parkinson’s is a neurodegenerative disease that mainly affects movement.

Unlike many neurological disorders, the abnormality at the root of Parkinson’s is known.

It’s caused by cell death in an area of the brain called the “substantia nigra.” The cells produce dopamine, a chemical that functions as a neurotransmitter, sending signals between the brain cells involved in movement. By the time Parkinson’s is diagnosed, it’s estimated that approximately 80% of dopamine-producing cells have stopped functioning. The significant decrease in dopamine levels causes the symptoms of Parkinson’s to appear.

Fortunately, several drugs are available to compensate for the loss of dopamine, making it possible to control symptoms and preserve an excellent quality of life for several years after a diagnosis has been made. Unfortunately, there are currently no drugs to slow or halt the progression of Parkinson’s.


Everyone with Parkinson’s is unique and experiences different symptoms. However, since the disease is progressive, existing symptoms will worsen and new ones may appear.

It’s difficult to estimate how quickly Parkinson’s will progress in a person. In general, the first stage of the disease is a honeymoon period lasting three to eight years, where patients live practically a normal life. It is also the stage where treatment is most effective.

The disease may progress more quickly in people who are older when symptoms first begin and less quickly when the main symptom is tremor, especially when it starts on one side.

You can still lead an active life if you have Parkinson’s, depending on the age you are when symptoms begin, the way you manage your symptoms and your general state of health.

In most cases, Parkinson’s does not reduce life expectancy. However, risks increase as people age and the disease progresses. For example, balance problems can lead to falls, and swallowing problems can cause pneumonia if left untreated. Parkinson’s is a chronic (long-term) disease that requires constant vigilance and management to preserve quality of life.

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