Abstract
We would like to congratulate Sachdeva and colleagues for establishing an informative review regarding the effects of music/sound exposure on blood-brain barrier permeability and meningeal lymphatic/glymphatic clearance, and would appreciate the opportunity to make a comment. The review by Sachdeva and colleagues documents the beneficial effects of sound interventions on blood-brain barrier permeability and the activity of the meningeal lymphatic/glymphatic system. The authors further note that sound interventions may have the potential to reduce the accumulation of amyloid-β within the brain in Alzheimer's disease through improved meningeal lymphatic/glymphatic clearance. The authors also nicely discuss evidence that music influences sleep quality, which may facilitate glymphatic solute clearance as a result of an increase in the interstitial space, which results in reduced resistance to fluid transport. We fully agree with this notion, since we recently hypothesized that immersive sound therapy may be an innovative approach to reduce the individual risk of developing neurodegenerative diseases, such as Alzheimer's disease, by inducing EEG slow-wave delta oscillations (which characterize deep sleep), thereby promoting glymphatic clearance.
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