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Updated: Aug 22, 2026

Modification of a Colliculo-thalamocortical Mouse Brain Slice, Incorporating 3-D printing of Chamber Components and Multi-scale Optical Imaging
Published on: September 18, 2015
Intermediate targets in formation of topographic projections: inputs from the thalamocortical system
Sonia Garel1, John L R Rubenstein
1INSERM U368, Ecole Normale Supérieure- 46 rue d'Ulm 75230 Paris cedex 05, France.
Abstract:
Topography of axonal projections has been generally thought to arise from positional information located within the projecting and targeted structures, independent of events along the path or within the axonal bundle. Recent evidence suggests that in the projection from the dorsal thalamus to the neocortex, initial rostrocaudal targeting of axons is regulated at the level of an intermediate target, the subcortical telencephalon. In this system, thalamic axons are spatially positioned within the subcortical telencephalon, partly via interactions between EphAs and ephrin-As, and this positioning apparently determines the rostrocaudal level of the neocortex that the axons will initially target.
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