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Hodgkin-Huxley model of persistent activity in prefrontal cortex neurons (Winograd et al. 2008)
Accession: 113997
The paper demonstrate a form of graded persistent activity activated by hyperpolarization. This phenomenon is modeled based on a slow calcium regulation of Ih, similar to that introduced earlier for thalamic neurons (see Destexhe et al., J Neurophysiol. 1996). The only difference is that the calcium signal is here provided by the high-threshold calcium current (instead of the low-threshold calcium current in thalamic neurons).
Reference: Winograd M, Destexhe A, Sanchez-Vives MV (2008) Hyperpolarization-activated graded persistent activity in the prefrontal cortex. Proc Natl Acad Sci U S A 105:7298-303 [PubMed]
Citations  Citation Browser
Model Information (Click on a link to find other models with that property)
Model Type:  Neuron or other electrically excitable cell; Channel;
Brain Region(s)/Organism:  Prefrontal cortex (PFC);
Cell Type(s):   
Channel(s):  I Na,t; I L high threshold; I K; I M; I h;  
Gap Junctions:  
Receptor(s):  
Gene(s):  
Transmitter(s):  
Simulation Environment:  Neuron;
Model Concept(s):  Activity Patterns; Ion Channel Kinetics;
Implementer(s):  Destexhe, Alain [Destexhe at iaf.cnrs-gif.fr];
Search NeuronDB for information about:  I Na,t; I L high threshold; I K; I M; I h;
Model files   Download zip file   Auto-launch             Help downloading and running models      Versions
\
HAGPA
README.html
screenshot.jpg
HH2.mod
ICaL.mod
Ih.mod
IKM.mod
ipulse3.mod
pasi.mod
APCounter2.mod
Cadynamics.mod
demo_HPGA_non-saturating_noIh.hoc
mosinit.hoc
demo_HPGA_saturating.hoc
demo_HPGA_non-saturating.hoc
init.hoc
                            
Simulation of hyperpolarization-activated graded persistent
activity in prefrontal cortex

Reference: Winograd M, Destexhe A, Sanchez-Vives, MV.
Hyperpolarization-activated graded persistent activity in 
the prefrontal cortex.  Proc. Natl. Acad. Sci. USA
105: 7298-7303, 2008.

Intrinsic currents: INa, IKd for action potentials, IM for
spike-frequency adaptation, ICaL for calcium currents, 
calcium dynamics and the hyperpolarization-activated current
Ih.  There is also a calcium regulation of Ih, which was 
taken from thalamic neurons (Destexhe et al., J Neurophysiol.,
1996)

demo_HPGA_non-saturating.hoc:
"non-saturating" model (Fig 4 of the paper)

demo_HPGA_non-saturating_noIh.hoc: 
"non-saturating" model, no Ih (Fig 4 of the paper)

demo_HPGA_saturating.hoc: 
"saturating" model (supplementary Fig S7 of the paper)

Usage:

Autolaunch from ModelDB and select to run an above file from the radio
buttons and press Init & Run to generate graphs for example like (the
first Fig 4 non-saturating):

screenshot

or download and extract the archive, then under

linux/unix:
-----------

cd to the extracted folder and compile the mod files with nrnivmodl.
Then type "nrngui mosinit.hoc" to start the simulations.

mswin:
------

Compile the mod files with mknrndll (cd to the extracted folder and
make the dll).  Double click on mosinit.hoc file to start the
simulations.

MAC OS X:
---------

Drag and drop the extracted folder onto the mknrndll icon.  Drag and
drop the mosinit.hoc file on the nrngui icon to start the simulations.

The model files were supplied by Alain Destexhe.

20110406 updated to use methods cnexp and derivimplicit over euler

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