Question 1: a. Cm = cm * A Cm = .03 mm^2 *5nF/mm^2 = .015nF b. Rm = rm * a Rm = 2M(Ohm)mm^2 / .03mm^2 = 66.6 M(Ohm) c. Tau m = Rm * Cm Tau m = 66.6 M(Ohm) * .015nF = .0999 m(Ohm)F d. Vss = Vm + Iapp/Rm -60mV = -70mV + Iapp * 66.6 M(Ohm) Iapp =1.5mA e
Neuro Homework1. For reasonable Iapp ranges between 0 and 50 the model works well for correctly choosing a cell to fire. Significantly out side of this range however the model breaks down. If one of the inputs is negative the opposite result of cell
For all graphs the Y axis is hertz spiking rate, and the x axis is the orientation number (where orientation number = # * pi / 50 * pi 1. C=0.1 activity profile
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1. The following graph is a representation of the spike triggered average for the 300ms (or 150 time steps as shown on the y axis) preceding each spike. From this graph it is safe to assume that a spike is usually preceded by a stimulus spike approxi
% Th i s mode l i s based o f f o f the m-code wr i t ten by Pau l Mi l l e r , accessab le % at http:/people.brandeis.edu/~pmiller/COMP_NEURO/MATLAB/connors.m clear a l ; l vc lamp = 0 ; %are we i n v c lamp or not 1 = yes dt = 0.000005; tmax=8; cm