Each neuron branches into hundreds of long fibers known as DENDRITES, which have small SPINES,which recieve incoming data from any neighboring neuron's AXON TERMINAL.
This is known as a SYNAPSE.
This electrical stimuli is passed along through the cell's body and again to it's own Axon, delivering the message to its neighboring neuron's dendrite. This path of transmission through the brain is known as an ENGRAM, and the process takes only a millisecond.