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[projects] minor fixes, change supervisor for some projects

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This commit is contained in:
Jan Grewe
2021-02-01 14:07:44 +01:00
parent ea8a4922a4
commit b55b5789dd
7 changed files with 39 additions and 34 deletions
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19
projects/project_photoreceptor/photoreceptor.tex
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@@ -12,16 +12,15 @@
%%%%%%%%%%%%%% Questions %%%%%%%%%%%%%%%%%%%%%%%%%
\section*{Light responses of an insect photoreceptor.}
In this project you will analyze data from intracellular recordings of
a fly R\,1--6 photoreceptor. These cells show graded membrane
potential changes in response to a light stimulus. The membrane
potential of the photoreceptor was recorded while the cell was
stimulated with a light stimulus.
Fly R\,1--6 photoreceptors respond to light-on stimuli with graded membrane
potential changes. In the acompanying datasets you find the membrane
potential of a single R\,1-6 photoreceptor that was recorded while the receptor was
stimulated with a light stimulus of different amplitudes.
\begin{questions}
\question{} The accompanying dataset (photoreceptor\_data.zip)
contains seven mat files. Each of these holds the data from one
stimulus intensity and contains therr variables. (i)
stimulus intensity and contains three variables. (i)
\textit{voltage} a matrix with the recorded membrane potential from
10 consecutive trials, (ii) \textit{time} a matrix with the
time-axis for each trial, and (iii) \textit{trace\_meta} a structure
@@ -36,8 +35,8 @@ stimulated with a light stimulus.
the individual responses as a function of time.
\part Intracellular recordings often suffer from drifts in the resting
potential. This leads to a large variability in the responses which is technical and not a cellular
property. To compensate for such drifts trials are aligned to the
potential. This leads to a large variability in the responses which has technical reasons and is not a cellular
property. To compensate for such drifts trials usually are aligned to the
resting potential before stimulus onset.
Replot the data but with the compensation for the drifts.
@@ -46,9 +45,9 @@ stimulated with a light stimulus.
\part You will notice that the responses have three main parts, (i) a
pre-stimulus phase, (ii) the phase in which the light was on, and (iii)
a post-stimulus phase. Create an characteristic curve that
a post-stimulus phase. The light-on phase can further be devided into two parts, the onset, and the "steady state" response part. Create an characteristic curve that
plots the response strength as a function of the stimulus
intensity for the ``onset'' and the ``steady state''
intensity for ``onset'' and ``steady state''
phases of the light response.
\part The light switches on at time zero. Estimate the delay