A study into the genetic make-up of people with Parkinson's has recently updated its criteria for participants, so family members can take part too.
New research suggests that severe head injury, which causes loss of consciousness, could be linked to increased risk of developing Parkinson's.
Initial data suggest that GDNF is safe, but in-depth analysis of the data is underway to find out if the treatment is effective for people with Parkinson's.
Researchers have discovered that the genes affected in Parkinson's play an important role in protecting cells from attack by the body's own immune system.
On 29 May pimavanserin was approved by the US Food and Drug Administration as the first drug for treating hallucinations and delusions