neurohw4 - 1. The following graph is a representation of...

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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 approximately 285ms before the actual neural spike. 0 50 100 150 -0.5 0 0.5 1 1.5 2 2.5 3 Code that generates the spike triggered average clear  all ; load  datafilehw4.mat ;   bin = zeros(1,150);   for  i=1:length(rho)      if          for  j=1:150             bin(j) = bin (j) + stim (i-j);          end      end end bin = bin / (length(rho) - 150);    
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2. Whitenoise, with t on the x axis and the value of the whitenoise on the y axis 0 1 2 3 4 5 6 7 8 9 10 -40 -30 -20 -10 0 10 20 30 40
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The correlation function for the above whitenoise graph with correlation on the y and time on the x 0 1 2 3 4 5 6 7 8 9 10 -15 -10 -5 0 5 10 The average correlation value overall was 0.7424, meaning that the computer produces numbers that are close to random (perfect random would have a value of 1)
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3. The firing rate in response to the above whitenoise stimulus, with firing rate in hertz, and graphed versus time 0 1 2 3 4 5 6 7 8 9 10 49.5 49.6 49.7 49.8 49.9 50 50.1 50.2 50.3 50.4
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The related correlation function for the above rate values, graphed versus negative tau. 0 1 2 3 4 5 6 7 8 9 10 -0.7 -0.6 -0.5 -0.4 -0.3 -0.2 -0.1 0 0.1 0.2 0.3
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The related D(tau) function, graphed versus tau. 0 1
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This note was uploaded on 09/21/2008 for the course NBIO 136 taught by Professor Miller during the Spring '06 term at Brandeis.

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neurohw4 - 1. The following graph is a representation of...

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