Wiring the Brain with Insulin

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Science  18 Apr 2003:
Vol. 300, Issue 5618, pp. 440-441
DOI: 10.1126/science.1084513

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The activities of insulin in regulating glucose levels and controlling many other physiological processes are well documented. Surprisingly, as Dickson comments in his Perspective, insulin has now been found to participate in guiding photoreceptor cell axons from the retina to the brain during development of the visual system in the fruit fly ( Song et al.).