Moreover, Researchers discovered that extended PBM treatment diminishes the degeneration of dopaminergic neurons induced by the excessive production of human α-synuclein in the substantia nigra of a rat model with PD.88 The method included exposing both sides of the rat’s head to 808-nm near-infrared light daily for 28 days, which enhanced motor function affected by α-syn, as assessed using the cylinder test. The gene discussed is SNCA; the disease is Parkinson disease.