New model of retinocollicular mapping predicts the mechanisms of axonal competition and explains the role of reverse molecular signaling during development.

Abstract excerpt

Precise connections in the brain result from elaborate processes during development. In the visual system, axonal projections from retinal ganglion cells (RGCs) onto the superior colliculus form a precise retinotopic map. Studies have revealed that the development of retinocollicular maps involves three main factors: graded expression of molecular guidance cues such as EphAs and ephrin-As, activity-dependent...

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