An electrophysiological model of GABAergic double bouquet cells (Chrysanthidis et al. 2019)

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We present an electrophysiological model of double bouquet cells (DBCs) and integrate them into an established cortical columnar microcircuit model that implements a BCPNN (Bayesian Confidence Propagation Neural Network) learning rule. The proposed architecture effectively solves the problem of duplexed learning of inhibition and excitation by replacing recurrent inhibition between pyramidal cells in functional columns of different stimulus selectivity with a plastic disynaptic pathway. The introduction of DBCs improves the biological plausibility of our model, without affecting the model's spiking activity, basic operation, and learning abilities.
1 . Chrysanthidis N, Fiebig F, Lansner A (2019) Introducing double bouquet cells into a modular cortical associative memory model Journal of Computational Neuroscience
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Model Information (Click on a link to find other models with that property)
Model Type: Realistic Network;
Brain Region(s)/Organism:
Cell Type(s): Neocortex U1 interneuron basket PV GABA cell; Neocortex U1 L2/6 pyramidal intratelencephalic GLU cell; Abstract integrate-and-fire adaptive exponential (AdEx) neuron; Neocortex layer 2-3 interneuron; Neocortex bitufted interneuron;
Gap Junctions:
Simulation Environment: NEST;
Model Concept(s): Learning;
Implementer(s): Chrysanthidis, Nikolaos [nchr at]; Fiebig, Florian [fiebig at]; Lansner, Anders [ala at];
Search NeuronDB for information about:  Neocortex U1 L2/6 pyramidal intratelencephalic GLU cell; Neocortex U1 interneuron basket PV GABA cell;
dld_link.c *
dlopen.c *
dyld.c *
load_add_on.c *
loadlibrary.c *
preopen.c *
shl_load.c *
/* loader-dld_link.c -- dynamic linking with dld

   Copyright (C) 1998, 1999, 2000, 2004, 2006,
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   Written by Thomas Tanner, 1998

   NOTE: The canonical source of this file is maintained with the
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#include "lt__private.h"
#include "lt_dlloader.h"

/* Use the preprocessor to rename non-static symbols to avoid namespace
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   Use the "<module_name>_LTX_" prefix so that the symbol addresses can
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#define get_vtable	dld_link_LTX_get_vtable

LT_SCOPE lt_dlvtable *get_vtable (lt_user_data loader_data);

/* Boilerplate code to set up the vtable for hooking this loader into
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static int	 vl_exit  (lt_user_data loader_data);
static lt_module vm_open  (lt_user_data loader_data, const char *filename,
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static int	 vm_close (lt_user_data loader_data, lt_module module);
static void *	 vm_sym   (lt_user_data loader_data, lt_module module,
			  const char *symbolname);

static lt_dlvtable *vtable = 0;

/* Return the vtable for this loader, only the name and sym_prefix
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   change between loaders.  */
lt_dlvtable *
get_vtable (lt_user_data loader_data)
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      vtable->module_open	= vm_open;
      vtable->module_close	= vm_close;
      vtable->find_sym		= vm_sym;
      vtable->dlloader_exit	= vl_exit;
      vtable->dlloader_data	= loader_data;
      vtable->priority		= LT_DLLOADER_APPEND;

  if (vtable && (vtable->dlloader_data != loader_data))
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  return vtable;

/* --- IMPLEMENTATION --- */

#if defined(HAVE_DLD_H)
#  include <dld.h>

/* A function called through the vtable when this loader is no
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static int
vl_exit (lt_user_data LT__UNUSED loader_data)
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  return 0;

/* A function called through the vtable to open a module with this
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static lt_module
vm_open (lt_user_data LT__UNUSED loader_data, const char *filename,
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  return module;

/* A function called through the vtable when a particular module
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static int
vm_close (lt_user_data LT__UNUSED loader_data, lt_module module)
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/* A function called through the vtable to get the address of
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static void *
vm_sym (lt_user_data LT__UNUSED loader_data, lt_module LT__UNUSED module,
	const char *name)
  void *address = dld_get_func (name);

  if (!address)

  return address;