Cable theory
Mathematical model of a dendrite / From Wikipedia, the free encyclopedia
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In neuroscience, classical cable theory uses mathematical models to calculate the electric current (and accompanying voltage) along passive[lower-alpha 1] neurites, particularly the 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 and resistances combined in parallel (see Fig. 1). The capacitance of a neuronal fiber comes about because electrostatic forces are acting through the very thin lipid bilayer (see Figure 2). The resistance in series along the fiber is due to the axoplasm's significant resistance to movement of electric charge.