adaptation of the assignments to the modern times

projects/project_stimulus_reconstruction/stimulus_reconstruction.tex

@@ -6,8 +6,8 @@
 \pagestyle{headandfoot}
 \runningheadrule
 \firstpageheadrule
-\firstpageheader{Scientific Computing}{Project Assignment}{11/05/2014
-  -- 11/06/2014}
+\firstpageheader{Scientific Computing}{Project Assignment}{11/02/2015
+  -- 11/05/2015}
 %\runningheader{Homework 01}{Page \thepage\ of \numpages}{23. October 2014}
 \firstpagefooter{}{}{{\bf Supervisor:} Jan Grewe}
 \runningfooter{}{}{}
@@ -31,8 +31,16 @@
 
 %%%%%%%%%%%%%% Questions %%%%%%%%%%%%%%%%%%%%%%%%%
 \section*{Reverse reconstruction of the stimulus evoking neuronal responses.}
-During the course we have used the Spike-Triggered-Average to
+To analyse encoding properties of a neuron one often calculates the
+Spike-Triggered-Average (STA).
+\[ STA(\tau) = \frac{1}{\langle n \rangle} \left\langle
+  \displaystyle\sum_{i=1}^{n}{s(t_i - \tau)} \right\rangle \] 
+
+The STA is the average stimulus that led to a spike in the neuron and
+can calculated by cutting out snippets form the stimulus centered on
+the respective spike time. The Spike-Triggered-Average can be used to
 reconstruct the stimulus a neuron has been stimulated with.
+
 \begin{questions}
   \question In the accompanying files you find the spike responses of
   P-units and pyramidal neurons of the weakly electric fish