First I'd like to thank some frequent contributors to brain topics in the Physics Forums: (in unbiased alphabetic order) atyy Moonbear neurocomp2003 somasimple zoobyshoe Some great discussions on brain topics here! Based on frequency of the word "brain" in subject headings I would say it's the most popular topic in the Medical Sciences section. Does anyone know if serious collaboration ever originated in Physics Forums? It would be pretty cool! getting to the point I find it remarkable that vision and sound are such vastly different conscious experiences, yet both are described by neuronal communication. I'm expecting the consensus is "No one knows why this is", so it would be helpful if anyone had links/references regarding differences between neuronal activity in visual vs. auditory systems (e.g. firing patterns, chemical properties, etc). Just a first guess is perception is vastly different because signaling in the visual system occurs much faster than in the auditory system (since cells are interpreting light frequencies vs. sound frequencies). But that's strictly intuitive argument hence the request for more sound research. Any help would be greatly appreciated. Thank you.