@DrYohanJohn In fly larvae, the 21 OSNs are sorted into groups of 3, whose axons bundle tightly packed together and with each group of 3 isolated from the other 6 groups. Will have to dig it up, but this one comes quickly to mind:

"Non-synaptic inhibition between grouped neurons in an olfactory circuit", Su et al. 2012 https://www.nature.com/articles/nature11712

#neuroscience #Drosophila #olfaction #EphapticCoupling

@ekmiller @DrYohanJohn @dumoulin @bwyble @laurentperrinet @NicoleCRust @achristensen56
so the suspicion I have from this is that traveling waves and other wavelike phenomena like scroll and spiral waves that you see in other excitable dynamical systems are actually way way way more common and way way way more determinative of function that we typically appreciate, but because we can't "untangle" the connectomic topology it plays out on we don't notice them as such and it ends up looking like the quasi-independent salt and pepper activity we usually describe it as. Everyone should read Art Winfree's geometry of biological time for how these dynamical regimes are almost unavoidable in excitable dynamical systems!

But again with the "multiple dynamical regimes at different scales" thing - wavelike phenomena also should happen with much less but still nonzero effect in a quasi-euclidean way via #EphapticCoupling - extracellular space is obvs tightly packed full of resistive tissue and everything so it's not strictly euclidean either, but moreso than the connectomic dynamical manifold.

This is the kinda thing that makes me wish I stayed doing neuroscience, bc I feel like these are sort of inescapable truths of how the brain works - that should be super important for understanding it! - but I have seen almost no work that really takes them seriously (but would love to because I'm sure it's out there)

#Topology #NeuralTopology #DynamicalSystems