BIOL 3156 Lecture Notes - Lecture 3: Neural Crest, Neural Tube, Neural Plate
Document Summary
As the neural tube develops, it will make several subdivisions in a cephalic-decaudal fashion the first differentiation occurs at the head region and the last differentiation occurs at the tail. The eye develops from regions in the diencephalon. Differential cell division placodes (thickened preseumptive epidermal ectoderm tissue that forms sites of sensory innervations) Selective cell die off thinner regions the roof of the neural tube is very thin and sometimes tends to collapse on itself. Flexures cell shape changes, bends and convolutions (movements of cells) The n-cadherins (neural crest cell migrations from to make the neural plate) Where an optic cup forms associated with the diencephalon, there is a formation of a lens vesicle that becomes closely associated with the optic cup. If we removed it, no such vesicle would form. If we put the optic cup if flank tissue, it would also not form the lens. This is because pax6 is not being produced in this tissue.
