Figure P44

a. Sketch and dimension the RPFM SGL input, Ve (t), when both photoreceptors are given a long pulse of light: I(t) = Io [U(t) - U(t - T)]. That is, T > a-1, b-1. U(t) is a unit step function.

b. Simulate the system using a Simnon neural model, and observe the spike output of N3. The three ODEs required are:

(Excitatory LPF) (Inhibitory LPF) (RPFM LPF) (SGLgenerator potential)

Complete simulation of the RPFM SGL with Simnon requires the auxiliary equations:

dv = - v*c + c*Ve - z " z is reset pulse; dv = v. w = IF v > phi THEN 1 ELSE 0 s = DELAY (w, dT)

x = w - s " pulse former y = IF x > 0 THEN x ELSE 0 " half-wave rectification, y are unit output pulses, z = y*phi/dT

In the simulation, let a = 2, b = 1, phi = 1, c = 1, dT = 0.001 (same as Euler integration At), K*Io = 1. Plot I(t), Ve(t), v(t), and y.

Was this article helpful?

0 0
Peripheral Neuropathy Natural Treatment Options

Peripheral Neuropathy Natural Treatment Options

This guide will help millions of people understand this condition so that they can take control of their lives and make informed decisions. The ebook covers information on a vast number of different types of neuropathy. In addition, it will be a useful resource for their families, caregivers, and health care providers.

Get My Free Ebook

Post a comment