Sources for HTM minicolumn bursting phenomenon?

[dmac]

My theory is that the bursts are caused by gap-junctions between pyramidal neurons, see the following article for more information about them:

Electrotonic Coupling between Pyramidal Neurons in the Neocortex

Abstract Electrotonic couplings (i.e., electrical synapses or gap junctions) are fundamental to neuronal synchronization, and thus essential for many physiological functions and pathological disorders. Interneuron electrical synapses have been studied intensively. Although studies on electrotonic couplings between pyramidal cells (PCs) are emerging, particularly in the hippocampus, evidence is still rare in the neocortex. The electrotonic coupling of PCs in the neocortex is therefore largely un…