Ephaptic coupling in white matter fibre bundles modulates axonal transmission delays
Fig 1
Computing the extracellular potential (EP) generated by a volley of spikes.
A: An action potential, as expressed by the membrane potential Vm along the axial dimension z, generates an EP that varies with z and the distance from the axon d. B: An action potential in an active axon perturbs the membrane potential of a passive axon via the EP. C: We consider spike volleys travelling along axonal fibre bundles, and D: infer from the EP the cumulative effect on the membrane potential of a passive axon.