Optical Wiring
Within the brain, neurons communicate with each other through complex structures called synapses. The formation of numerous synapses between multiple neurons to achieve a specific function leads to the creation of neuronal circuits. This image of a fly eye shows the synapses (blue or red) and neuronal membranes (green) of multiple types of visual neurons. These neurons connect with other neurons of the visual system to form a circuit that relays visual information from the eye into the processing centers of the brain. Visualizing circuits helps us better understand how the nervous system develops and functions.