How Yoga Enhances The Glymphatic And Lymphatic System To Clear Potentially Neurotoxic Waste And Thereby Help Steady The Fluctuations Of The Mind. The quality of sleep plays a fundamental role for the efficiency of these cleaning and clearing mechanisms. Focusing specifically on the fairly recent discovery of the glymphatic system [2] as well as lymphatic vessels in the brain and the important role that sleep plays with the removal of waste, apana, I propose that yoga can play an integral role by stimulating the parasympathetic nervous system and thereby both enhancing sleep, as well as boosting the immune system.