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124 changes: 0 additions & 124 deletions README

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# NEURON Tutorial for Implementing Simulations of Networks of Thalamic Reticular Neurons

Alain Destexhe
Laboratory for Computational Neuroscience
Unité de Neurosciences Intégratives et Computationnelles (UNIC)
Centre National de la Recherche Scientifique (CNRS)
91198 Gif-sur-Yvette, France

Formerly from (when this work was created):
Department of Physiology, Laval University,
Quebec G1K 7P4, Canada

Destexhe@iaf.cnrs-gif.fr
[http://cns.iaf.cnrs-gif.fr/Main.html](http://cns.iaf.cnrs-gif.fr/Main.html)

---

This package is running with the NEURON simulation program written by Michael Hines and available on internet at:
- [http://www.neuron.yale.edu/neuron/](http://www.neuron.yale.edu/neuron/)
- [http://neuron.duke.edu/](http://neuron.duke.edu/)

The package contains mechanisms (.mod files) and programs (.oc files) needed to simulate networks of thalamic reticular (RE) neurons interacting with inhibitory synapses. The approach followed here uses the object-oriented facilities of NEURON to simulate networks, and can be applied to other types of neurons and/or other types of synaptic interactions.

This model studies the genesis of 10Hz oscillations by inhibitory networks of RE neurons in the thalamus. Each neuron is described by a single-compartment containing voltage- and calcium-dependent currents described by Hodgkin-Huxley type of model. Synaptic interactions are handled by kinetic models of postsynaptic receptors of the GABA_A and GABA_B types.

The models given here are described in detail in the following paper:

Destexhe, A., Contreras, D., Sejnowski, T.J. and Steriade, M.
A model of spindle rhythmicity in the isolated thalamic reticular nucleus.
*Journal of Neurophysiology*, 72: 803-818, 1994.

A postscript version of this paper, including figures, is available on internet at
[http://cns.iaf.cnrs-gif.fr/Main.html](http://cns.iaf.cnrs-gif.fr/Main.html)

## Programs

Each program reproduces one figure of the paper:

- **Fig5A.hoc** : 2 neurons connected with GABA_A synapses
- **Fig5B.hoc** : 2 neurons connected with GABA_A synapses + self-connections
- **Fig6A.hoc** : 5 neurons connected with GABA_A synapses (first-neighbor)
- **Fig6B.hoc** : 5 neurons connected with GABA_A synapses (first-neighbor+self)
- **Fig6C.hoc** : 5 neurons connected with GABA_A synapses (2nd-neighbor)
- **Fig6D.hoc** : 5 neurons connected with GABA_A synapses (all-to-all)
- **Fig13A.hoc** : 2 neurons connected with GABA_B synapses
- **Fig13B.hoc** : 2 neurons connected with GABA_B synapses + self-connections

## Mechanisms

- **HH2.mod** : Hodgkin-Huxley kinetics for action potentials
- **IT2.mod** : low-threshold calcium current of thalamic RE neurons
- **IAHP.mod** : calcium-activated K+ current responsible for AHP
- **ICAN.mod** : calcium-activated nonspecific cation current
- **capump.mod** : calcium clearance mechanisms

- **gaba.mod** : two-state kinetic model for GABA_A receptors
- **gabab1.mod** : two-state kinetic model for GABA_B receptors

## How to Run

Use autolaunch on modeldb or:

### Unix platform:

To compile the demo, NEURON and INTERVIEWS must be installed and working on the machine you are using. Just type `nrnivmodl` to compile the mechanisms given in the mod files.

Then, execute the main demo program by typing:

```
nrngui mosinit.hoc
```

### MS Windows platform:

Compile the mechanism (mod) files by using mknrndll. Then start the simulation by clicking on `mosinit.hoc` in Windows Explorer.

### Back to any platform:

Once the menu and graphics interface has appeared, click on a simulation from the *Simulations of thalamic reticular network* window. Reposition the windows to find the Run Control window. Then click on **Init and Run** button to start the simulation on the RunControl window.

For more information about how to get NEURON and how to install it, please refer to the following sites:
- [http://www.neuron.yale.edu/neuron/](http://www.neuron.yale.edu/neuron/)
- [http://neuron.duke.edu/](http://neuron.duke.edu/)

For further information, please contact:

Alain Destexhe
Laboratory for Computational Neuroscience
Unité de Neurosciences Intégratives et Computationnelles (UNIC)
Centre National de la Recherche Scientifique (CNRS)
91198 Gif-sur-Yvette, France

Destexhe@iaf.cnrs-gif.fr
[http://cns.iaf.cnrs-gif.fr/Main.html](http://cns.iaf.cnrs-gif.fr/Main.html)

---
## Changelog
7/11/2005 this model updated to close windows and reopen a run control window between simulations.

ModelDB-Note: This model updated for NEURON version 4.3.1 and higher.

10/2007 AD, better synaptic mechanisms using counters

1/6/2012 changed mod files for better solve methods (avoid euler)
as per web page [http://www.neuron.yale.edu/phpbb/viewtopic.php?f=28&t=592](http://www.neuron.yale.edu/phpbb/viewtopic.php?f=28&t=592)

5/27/2025 Standardized to Markdown.