From bc2c8c99842742c329736676993518e563a67226 Mon Sep 17 00:00:00 2001
From: Jan Benda <jan.benda@uni-tuebingen.de>
Date: Sun, 31 Jan 2021 22:33:51 +0100
Subject: [PATCH] [projects] fixed serialcorrelations
---
.../serialcorrelation.tex | 44 +++++++++++++------
1 file changed, 30 insertions(+), 14 deletions(-)
diff --git a/projects/project_serialcorrelation/serialcorrelation.tex b/projects/project_serialcorrelation/serialcorrelation.tex
index 98dc07e..3950c7a 100644
--- a/projects/project_serialcorrelation/serialcorrelation.tex
+++ b/projects/project_serialcorrelation/serialcorrelation.tex
@@ -9,21 +9,28 @@
\input{../instructions.tex}
-
-%%%%%%%%%%%%%% Questions %%%%%%%%%%%%%%%%%%%%%%%%%
+The gymnotiform weakly electric fish \textit{Apteronotus
+ leptorhynchus} has an active electrosensory system. An electric
+organ generates an electric field surrounding the
+fish. Electroreceptive organs distributed over the whole body of the
+fish sense minute perturbations of the electric field caused by
+objects close to the fish. P-unit electroreceptor afferents send
+information from the electroreceptive organs to the brain. They are
+spontaneously active when the fish is not electrically stimulated,
+that is when the electroreceptors are only stimulated by the fish's
+own unperturbed electric field.
+
+In this project we want to analyze how the baseline firing rates and
+the serial correlations of the interspike intervals vary between
+different P-units.
+
+In the file \texttt{baselinespikes.mat} you find two variables:
+\texttt{cells} is a cell-array with the names of the recorded cells
+and \texttt{spikes} is a cell array containing the spike times in
+seconds of recorded spontaneous activity for each of these cells.
\begin{questions}
- \question P-unit electroreceptor afferents of the gymnotiform weakly
- electric fish \textit{Apteronotus leptorhynchus} are spontaneously
- active when the fish is not electrically stimulated.
-
- How do the firing rates and the serial correlations of the
- interspike intervals vary between different cells?
-
- In the file \texttt{baselinespikes.mat} you find two variables:
- \texttt{cells} is a cell-array with the names of the recorded cells
- and \texttt{spikes} is a cell array containing the spike times in
- seconds of recorded spontaneous activity for each of these cells.
+ \question Baseline firing rates
\begin{parts}
\part Load the data! How many cells are contained in the file?
@@ -38,12 +45,21 @@
\part Compute the firing rate of each cell, i.e. number of spikes per time.
Illustrate the results by means of a histogram and/or box whisker plot.
+ \end{parts}
- \part Compute and plot the serial correlations between interspike intervals up to lag 10.
+ \question Serial correlations
+ \begin{parts}
+ \part Compute and plot the serial correlations between interspike
+ intervals up to lag 10.
What do you observe? In what way are the interspike-interval
correlations similar betwen the cells? How do they differ?
+ \part Illustrate relevant serial correlations with a return
+ map. How is the return map related to what you see in the
+ corresponding raster plot? How is it related to the corresponding
+ serial correlation?
+
\part Implement a permutation test for computing the significance
at an appropriate significance level of the serial
correlations. Keep in mind that you test the correlations at 10