When Olsson inserted the microelectrodes into Armillaria’s hyphal strands, he detected regular action potential–like impulses, firing at a rate very close to that of animals’ sensory neurons—around four impulses per second, which traveled along hyphae at a speed of at least half a millimeter per second, some ten times faster than the fastest rate of fluid flow measured in a fungal hypha.
Animals run at 4 hz?
