Nearby, farther down the tree, closer to the target neuron’s body, we can see axon ends that have not come from the retina. Rather, they have been sent from small, rare neurons nearby. And these send across the gap a different molecule, GABA. When GABA locks into the GABA-shaped receptors on the same tree, the voltage flickers downward, decreasing. Unsurprisingly, we call this “inhibition.”
