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The Brain-Nose Interface: A Potential Cerebrospinal Fluid Clearance Site in Humans
Neel H Mehta1, Jonah Sherbansky2, Angela R Kamer3
1Undergraduate Department of Biology, Cornell University, Ithaca, NY, United States.
Frontiers in Physiology
|January 21, 2022
Summary
Cerebrospinal fluid (CSF) clearance via the nose-brain pathway is established in animals but needs more human research. Understanding this route may offer insights into neurodegenerative diseases.
Area of Science:
- Neuroscience
- Immunology
- Anatomy
Background:
- The brain relies on cerebrospinal fluid (CSF) for homeostasis and neurological function.
- CSF circulates through ventricles and has multiple known drainage pathways.
- A proposed pathway involves CSF clearance through the olfactory nerve at the cribriform plate into nasal lymphatics.
Purpose of the Study:
- To synthesize current evidence on CSF clearance at the nose-brain interface.
- To examine the anatomical pathway across species.
- To explore the significance of this pathway in human neurodegenerative diseases.
Main Methods:
- Literature review synthesizing contemporary evidence.
- Cross-species anatomical pathway examination.
- Analysis of immune surveillance in the olfactory region.
Main Results:
- CSF clearance via the olfactory nerve pathway is demonstrated in multiple animal species.
- Evidence for a similar human CSF egress mechanism involving the nasal cavity is currently limited.
- The nose-brain pathway involves immune surveillance and environmental interactions.
Conclusions:
- Further research is needed to consolidate evidence for human CSF clearance via the nasal cavity.
- Understanding the brain-nose pathway may improve insights into neurodegenerative and infectious diseases.
- This pathway could offer novel avenues for disease prevention and treatment.
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