Neuroepithelium
The thick, multi-row epithelium of the neural plate or the neural tube folded from it is referred to as the neuroepithelium .
The wall cells of the neural tube differentiate in the course of development into neuroblasts , glioblasts and ependymal cells . In addition, neural stem cells of the neural tube also differentiate into sensory cells , for example the retina, in a particular topographical location . In addition, not only afferent neurons arise from derivatives of the neural crest , but also those that become sensory cells, for example the sense of smell. The cell layers of these sensory cells are also called - in a broad sense - neuroepithelium.
Sensory cells
Sensory cells of neuroepithelial origin are found in the retina of the eye and the olfactory epithelium of the nose. However, not all sensory cells are of neuroectodermal or neuroepithelial origin (see also → epithelium ). The sensory cells of the auditory organ that enable hearing as well as the sensory cells of the crista ampullaris of the semicircular canals and those of the maculae utriculi et sacculi within the equilibrium organ in the inner ear are not of neurectodermal, but ectodermal origin (see ear plaque ). Occasionally they are still referred to as "neuroepithelial" because of their appearance similar to the neuroepithelium, since the initially consistently high epithelium of the labyrinth vesicle does not recede into a flat epithelium at these points.
Neuroepithelium in a narrow sense
The term neural epithelium is often used - and then used solely for the embryonic neuroepithelium of the neural tube - in order to linguistically express a difference to the aforementioned, resulting, permanent neuroepithelial structures of sense organs.
Individual evidence
- ↑ Neuroepithelium. In: Norbert Boss (Ed.): Roche Lexicon Medicine. 2nd Edition. Hoffmann-La Roche AG and Urban & Schwarzenberg, Munich 1987, ISBN 3-541-13191-8 , p. 1233, cf. a. Gesundheit.de/roche
- ^ Hermann Voss , Robert Herrlinger : Taschenbuch der Anatomie. Volume III: nervous system, sensory system, skin system, increment system. 12th edition. Gustav-Fischer, Jena 1964, p. 212, to chap. The organ of smell, Stw. "Smell cell = nerve cell".
- ↑ Otto Grosser, arr. by Rolf Ortmann: Outline of the human development history . 6th edition. Springer, Berlin 1966, p. 93, to chap. "Hearing and balance organs".