Feedforward heteroassociative network with HH dynamics (Lytton 1998)

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Accession:7399
Using the original McCulloch-Pitts notion of simple on and off spike coding in lieu of rate coding, an Anderson-Kohonen artificial neural network (ANN) associative memory model was ported to a neuronal network with Hodgkin-Huxley dynamics.
Reference:
1 . Lytton WW (1998) Adapting a feedforward heteroassociative network to Hodgkin-Huxley dynamics. J Comput Neurosci 5:353-64 [PubMed]
Model Information (Click on a link to find other models with that property)
Model Type: Realistic Network;
Brain Region(s)/Organism: Hippocampus;
Cell Type(s):
Channel(s): I Na,t; I K;
Gap Junctions:
Receptor(s): GabaA; AMPA;
Gene(s):
Transmitter(s):
Simulation Environment: NEURON;
Model Concept(s): Pattern Recognition; Temporal Pattern Generation; Spatio-temporal Activity Patterns; Simplified Models; Attractor Neural Network;
Implementer(s): Lytton, William [billl at neurosim.downstate.edu];
Search NeuronDB for information about:  GabaA; AMPA; I Na,t; I K;
/
lytton98
README
AMPA.mod
GABAA.mod
kdr.mod
matrix.mod *
misc.mod.orig
naf.mod *
passiv.mod *
precall.mod
pregen.mod *
pregencv.mod
pulsecv.mod
sinstim.mod *
vecst.mod
bg.inc *
boxes.hoc *
declist.hoc *
decvec.hoc *
default.hoc *
directory
fig5.gif
grvec.hoc
init.hoc
labels.hoc
loadr.hoc *
local.hoc *
mosinit.hoc *
net.hoc
nrnoc.hoc *
params.hoc
presyn.inc
proc.hoc
run.hoc
simctrl.hoc *
sns.inc *
snsarr.inc
snscode.hoc
snshead.inc *
spkts.hoc
tmpl.hoc
xtmp
                            
: $Id: precall.mod,v 1.3 1995/12/16 19:00:01 billl Exp $

COMMENT
presynaptic pointer array
ENDCOMMENT

INDEPENDENT {t FROM 0 TO 1 WITH 1 (ms)}

NEURON {
  POINT_PROCESS PRESYN
  RANGE spk_internal, spk, num
  GLOBAL thresh
}

PARAMETER {
  thresh = 0 			: voltage level nec for release
  num = -1                 : number for reporting spk occurrence
}

ASSIGNED { 
  spk                           : available for user monitoring of spiking
  spk_internal                  : internal use only (if taken externally ...)
  v
}

INCLUDE "presyn.inc"

INITIAL {
  spk = 0
  spk_internal = 0
}

BREAKPOINT {
  SOLVE pp
}

PROCEDURE pp() {
  if (v > thresh) {    
    if (spk_internal == 0) {  
      newspike()                : only allow this to happen once
      spk_internal = 1
      spk = 1
      VERBATIM
      {char func[8] = "precall";
      Symbol* s = hoc_lookup(func);
      if (s && num>=0) {
        hoc_pushx(num);
        hoc_call_func(s, 1);
      }
      }
      ENDVERBATIM
    }
  } else { 
    spk_internal = 0            : drop back down at the end of the spike
    spk = 0
  }
}

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