This is pretty amazing stuff.
They can now briefly open select spots in the brain barrier using focused ultrasound and deliver larger particles like gene therapy (in microbubbles). So it would allow for minimally invasive, early treatment of neurological disorders.
Trial of Globus Pallidus Focused Ultrasound
UC Davis, China find may alleviate neuroinflammation in Parkinson’s disease
Young onset Parkinson’s patient 
Cough syrup for Parkinson’s patients
