More than a hundred years ago, the father of modern neuroscience, Santiago Ramón y Cajal demonstrated that information is the output of messy internal wiring provided by the brain's chemical synchronicity. He used his trained skills as an artist to illustrate the neuron doctrine.
He called the connection between the neural impulses synapses, the gaps between the neurons that allowed them to talk to each other. However, he couldn't identify the synapses under the microscope like we can with 200X magnification today.
You can still walk across an invisible bridge even if you can't physically see it there. All you need to know is that the magic is working.