Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Coupling continuous neural networks to the electromagnetic field in
  nervous tissue   We present a microscopic approach for the coupling of cortical activity, as
resulting from proper dipole currents of pyramidal neurons, to the
electromagnetic field in extracellular fluid in presence of diffusion and Ohmic
conduction. As a result, neural activity becomes represented by a continuous
neural field equation, while an observation model for electric field potentials
is obtained from the interaction of cortical dipole currents with charge
density in non-resistive extracellular space as described by the Nernst-Planck
equation.

28
The categories of this paper are: alg-geom
15
The categories of this paper are: nucl-ex
1
The categories of this paper are: cs
6
The categories of this paper are: astro-ph
9
The categories of this paper are: nlin
16
The categories of this paper are: stat
30
The categories of this paper are: q-alg
17
The categories of this paper are: q-fin
34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph
33
The categories of this paper are: plasm-ph
11
The categories of this paper are: hep-lat
36
The categories of this paper are: cmp-lg
13
The categories of this paper are: quant-ph
26
The categories of this paper are: bayes-an
0
The categories of this paper are: hep-ph