Our understanding of the human brain is experiencing a watershed moment.The sewerage gates are open.In 2024, scientists discovered the first direct evidence of an internal 'waste disposal system' hidden deep within the human brain and spinal cord.Now, just a few years later, researchers in Australia think this system could be driving the symptoms of a debilitating health condition affecting millions worldwide.Their preliminary research is published in Frontiers in Neuroscience. Chronic fatigue syndrome, sometimes known as myalgic encephalomyelitis (ME/CFS), has been neglected by the medical system for decades, and still has no known cause or cure.Historically, health experts assumed that when patients complained of extreme fatigue, 'brain fog', or persistent flu-like symptoms, it was all in their minds, as no other explanation could be found.In recent years, however, scientists have found 'unambiguous' biological markers of ME/CFS in the genes, spinal fluid, blood, and gut microbiome of patients.What's more, many of these clues are linked to the immune system or inflammation, indicating systemic health issues.Researchers at Griffith University in Australia now suspect that a broken brain sewage system may be at the very root of the problem."This study is the first to demonstrate impaired glymphatic function in ME/CFS using MRI, providing a mechanistic explanation for the inflammatory changes reported by other Australian and international teams," says neuroimmunologist Kiran Thapaliya."This suggests that dysfunction in the brain's natural cleaning system may be a key driver of this condition."The suspected structure of the human nasopharyngeal lymphatic plexus, based on findings in mice and monkeys. (Institute of Basic Science)The research is small and preliminary, but the hypothesis is logically sound.The glymphatic system is a new frontier in human physiology, and neuroscientists are only just beginning to sift through its muck and mire.Today, most of our knowledge of this system is based on research in mice, but it appears that the brain's recycling efforts are most active during sleep. This seems to be when toxic products or dead cells are flushed out of the mammalian brain, riding on 'waves' of cerebrospinal fluid. These pulses of liquid appear to be pumped by some obscure plumbing network that is still coming to light.