Peripheral Nervous SystemBrainbow axons

Photomicrograph taken from a “Brainbow” transgenic mouse that enables to distinguish between neighboring neurons by illuminating them in different colors. This image shows axons that carry commands from a brain region responsible for motor control to the muscles of the eye.

Photograph: Jean Livet (now Institut de la Vision, Paris), Jeff W. Lichtman et Joshua R. Sanes (Harvard University)