This code generates figures related to the model defined in
Chadderdon GL, Neymotin SA, Kerr CC, Lytton WW (2012)
Reinforcement learning of targeted movement in a spiking neuronal
model of motor cortex. PLoS ONE.
This document provides brief installation and usage instructions.
Note: the code has been designed to work on Linux machines. It may
work on Macs and will definitely not work on Windows. This
simulation also requires a good deal of memory to run: e.g. it will
run on a machine with ~ 8 GB, but not one with ~ 3 GB.
1. Unzip all files.
2. Type "nrnivmodl *.mod" in the directory. This should create a
directory called either i686 or x86_64, depending on your computer's
architecture, and put a file called "special" in that directory.
Run the simulation by typing "nrngui sim.hoc" in the directory.
After brief initialization, a window should appear showing the arm
moving with respect to the target X. After this has run for a
simulated 200 s, two more windows will be generated on top of this:
a window showing the spiking of all of the units of the model in
red for the first 1 s of the simulation, and another window showing
the trajectory of the elbow joint in blue as it learns to reach for
35 degrees. Note that the raster plot shows 96 PR and 96 EM
cells. 48 of each of these are related to shoulder joint activity
of the virtual arm; the firing of these cells is not shown in the
figures of the paper.
To run under a different learning target, you can go into arm.hoc,
Line 66 and change the value of 'targid' to pick a different elbow
angle target (0 = 135, 1 = 105, 2 = 75, 3 = 35, 4 = 0 degrees).
To choose a different learning condition, you can go to Line 54 and
change the value of RLMode: 0 = no-learning, 1 = reward-only,
2 = punishment only, 3 = reward-and-punishment. The random seed for
network wiring can be changed by going into Line 91 of network.hoc
and setting 'dvseed' to a different value. The random seed for the
babbling noise can be changed by resetting the value of 'inputseed'
in Line 13 in stim.hoc. After resetting these parameters and
saving the files, simulations can then be started as above.
20160921 Updates from the Lytton lab to allow the model to run on mac
20220517 Updated MOD files to contain valid C++ and be compatible with
the upcoming versions 8.2 and 9.0 of NEURON. Updated to use post ~2011
signature of mcell_ran4_init function and fix hashseed2 argument.