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

• DOI: 10.1063/1.4928652
• Publication Date: 2015-08-11T17:00:26Z
• Authors: David Emin; Massoud Akhtari; B. M. Ellingson; G. W. Mathern
• Keywords: Brain tissue

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