Parkinson's disease is, along with Alzheimer's, one of the main pathologies to strike the brain. It is still largely unknown what causes this insidious evil during which the patient gradually loses his ability to move.
The high presence of this protein in the cerebrospinal fluid, which bathes the brain, is "of great precision (to identify) the typical forms of Parkinson's disease", summarizes a study published in the Lancet Neurology. In patients with a genetic mutation - called LRRK2 - associated with certain forms of Parkinsons, the presence of aggregates is less systematic.