Human Development ECTODERM
Terms
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- Anencephaly
- Failure of the anterior nural tube region to close
- Cavitation
- Formation of a space within mass of cells
- Delaminate
- cells dissociate from an embryonic epithilian layer and migrate as mesenchymal cells.
- Ectopic
- Outside of normal position. e.g. Transplantation of embryonic cells to a new (Ectopic) site
- Floor Plate
- A specialized non-neuronal cells situated at the ventral midline of the neural plate/tube
- Neural Crest
- Transient structure composed of cells originally located in the dorsal most portion of the neural folds and closing neural tube
- Neural FOLDS
- Bilateral elevated portions of the neural plate flanking either side of the neural groove
- Neural Groove
- A midline ventral depression in the neural plate
- Neural Plate
- That portion of the dorsal ectoderm that becomes specified to become NEURAL ECTODERM
- Neuraxis
- The brain and spinal cord. In developmental terms reffers to neural tube from its costal to caudal end
- Neuroepithilium
- A single layer of rapidly dividing neural stem cells situated adjacent to the lumen of the neural tube
- Neurulation
- The process by which neural plate develops into a neural tube
- Primary neurulation
- The development of the neural tube from the neural plate
- Secondary neuralation
- The development of the neural tube from mesenchyme caudal to the posterior neuropore
- Sonic Hedgehog (SSH)
- Secreted paracrine factor that induces specific transcribtion factors. Made by notochord and floor plate.
- Spina Bifida
- Birth defect resulting from an unclosed section of the posterior neural tube or subsequent rapture of the posterior neural tube.