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Design principles of insect and vertebrate visual systems Sanes JR; Zipursky SLNeuron 2010[Apr]; 66 (1): 15-36A century ago, Cajal noted striking similarities between the neural circuits that underlie vision in vertebrates and flies. Over the past few decades, structural and functional studies have provided strong support for Cajal's view. In parallel, genetic studies have revealed some common molecular mechanisms controlling development of vertebrate and fly visual systems and suggested that they share a common evolutionary origin. Here, we review these shared features, focusing on the first several layers-retina, optic tectum (superior colliculus), and lateral geniculate nucleus in vertebrates; and retina, lamina, and medulla in fly. We argue that vertebrate and fly visual circuits utilize common design principles and that taking advantage of this phylogenetic conservation will speed progress in elucidating both functional strategies and developmental mechanisms, as has already occurred in other areas of neurobiology ranging from electrical signaling and synaptic plasticity to neurogenesis and axon guidance.|Animals[MESH]|Evolution, Molecular[MESH]|Eye/*cytology[MESH]|Insecta[MESH]|Light Signal Transduction/physiology[MESH]|Ocular Physiological Phenomena[MESH]|Photoreceptor Cells, Invertebrate/cytology/physiology[MESH]|Retina/*cytology/physiology[MESH]|Vertebrates[MESH]|Vision, Ocular/*physiology[MESH]|Visual Pathways/*physiology[MESH]|Visual Perception/*physiology[MESH] |
