neurons up, axon to dendrite, you can better understand how the neurons “talk” to one another. A Neuron Mystery Back when Santiago Ramón y Cajal was around, in the late 1800s, scientists didn’t know that the brain was made of individual neurons. Scientists thought that maybe neurons joined to one another to form a network. This network was spread throughout the brain, like a spiderweb.*
In the 1800s, scientists though that the brain was composed of a spiderweb of nuerons. They did not have powerful enough microscopes to see individual neurons.
