Neuron-to-neuron transmission of a-synuclein may cause ?-synuclein aggregates to propagate -- Accumulation of the synaptic protein ?-synuclein, resulting in the formation of aggregates called Lewy bodies in the brain, is a hallmark of Parkinson’s and other related neurodegenerative diseases.  This pathology appears to spread throughout the brain as the disease progresses.  Now, researchers at the…