Axons connected by gap junctions can produce very fast oscillations (VFOs, > 80 Hz) when stimulated randomly at a low rate. The models here explore the mechanisms of VFOs that can be seen in an axonal plexus, (Munro & Borgers, 2009): a large network model of an axonal plexus, small network models of axons connected by gap junctions, and an implementation of the model underlying figure 12 in Traub et al. (1999) . The large network model consists of 3,072 5-compartment axons connected in a random network. The 5-compartment axons are the 5 axonal compartments from the CA3 pyramidal cell model in Traub et al. (1994) with a fixed somatic voltage. The random network has the same parameters as the random network in Traub et al. (1999), and axons are stimulated randomly via a Poisson process with a rate of 2/s/axon. The small network models simulate waves propagating through small networks of axons connected by gap junctions to study how local connectivity affects the refractory period.
Model Type: Realistic Network; Neuron or other electrically excitable cell; Axon
Region(s) or Organism(s): Hippocampus
Cell Type(s): Hippocampus CA3 pyramidal GLU cell
Model Concept(s): Oscillations; Detailed Neuronal Models; Axonal Action Potentials; Epilepsy; Conduction failure
Simulation Environment: C or C++ program
Implementer(s): Munro, Erin [ecmun at math.bu.edu]
References:
Munro E, Börgers C. (2010). Mechanisms of very fast oscillations in networks of axons coupled by gap junctions. Journal of computational neuroscience. 28 [PubMed]