Lymphatic system

The glymphatic system, a part of the brain's lymphatic system, plays a key role in brain health by clearing away neural debris during sleep. This system is particularly active during slow-wave sleep, which is not associated with the dreaming stages of sleep (REM sleep). Its primary function is to enhance the clearance of metabolic waste from the central nervous system, which can help prevent issues like neurodegeneration and dementia, and assist in recovery from brain injuries. Activities that can promote this functionality include deep sleep and low-level physical activities like light jogging or walking. Additionally, practices such as slightly elevating the feet during sleep can enhance the function of this system 1 2.

For more detailed insights on the glymphatic system and its functions, you can refer to the episode "This is Your Brain on Sleep, Supplements, Sunlight, and Stimulation — Stanford Neuroscientist Andrew Huberman, PhD" on The Kevin Rose Show.