Ionic charge transport between blockages: Sodium cation conduction in freshly excised bulk brain tissue

AIP Advances
David EminG W Mathern

Abstract

We analyze the transient-dc and frequency-dependent electrical conductivities between blocking electrodes. We extend this analysis to measurements of ions' transport in freshly excised bulk samples of human brain tissue whose complex cellular structure produces blockages. The associated ionic charge-carrier density and diffusivity are consistent with local values for sodium cations determined non-invasively in brain tissue by MRI (NMR) and diffusion-MRI (spin-echo NMR). The characteristic separation between blockages, about 450 microns, is very much shorter than that found for sodium-doped gel proxies for brain tissue, >1 cm.

References

Oct 10, 2002·Journal of the American Chemical Society·Barbara HribarKen A Dill
Apr 22, 2005·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·James A GoodmanJeffrey J Neil
May 14, 2009·Bioelectromagnetics·Masaki SekinoShoogo Ueno
May 5, 2010·Brain Topography·M AkhtariG W Mathern

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Citations

Apr 29, 2021·AIP Advances·David EminMassoud Akhtari

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