## Dr. Ahmed G. Abo-Khalil

Electrical Engineering Department

## Cable theory

Classical cable theory uses mathematical models to calculate the flow of electric current (and accompanying voltage) along passive  neuronal fibers (neurites) particularly dendrites that receive synaptic inputs at different sites and times. Estimates are made by modeling dendrites and axons as cylinders composed of segments with capacitances$c_m$ and resistances$r_m$ combined in parallel (See Figure 1). The capacitance of a neuronal fiber comes about because electrostatic forces are acting through the very thin phospholipid bilayer (See Figure 2). The resistances in series along the fiber $r_l$ is due to the cytosol’s significant resistance to movement of electric charge.

Monday 10 -2

Tuesday 10-12

Thursday 11-1

### Contacts

email: a.abokhalil@mu.edu.sa

a_galal@yahoo.com

Phone: 2570

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