Embryology 4

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Across
  1. 2. week 6 for CNS development; nerve fibers that will connect with organ of corti have entered ___
  2. 4. forms cartilage cells adjacent to developing membranous cochlea
  3. 7. week that otocyst loses contact with surface ectoderm
  4. 8. week the cochlea has full 2 1/4 turns
  5. 10. week 5 for CNS development; neural cells that will supply cochlea arise from ___ and head toward neural tube
  6. 12. week that cochlear sensory epithelium begins to form; beginning development of ductus reuniens separating vestib organs from cochlear organs
  7. 15. formed from cells of medial inner ridge that remain attached but separate into columns
  8. 17. hair cells detected in all turns
  9. 18. cells in outer ridge remain tall and columnar, become ___ and claudius cells
  10. 19. approximate week the stereocilia closest to kinocilium begin to increase in height
  11. 20. week that outgrowth of saccule, coiling of cochlea duct begins
  12. 21. when hair cells differentiate, both afferent and efferent fibers can be seen on IHCs
  13. 23. formed from remainder of cells in inner ridge
  14. 26. low frequency hair cells initially develop at the ___ and as they develop, get pushed up to apex
Down
  1. 1. provides space between cartilaginous otic capsule and membranous cochlea
  2. 3. week for CNS development that cells from wall of neural groove migrate to otic placode
  3. 5. early beginning of otic capsule
  4. 6. at 30 days the ___ begins to form between otic vesicle and neural tube
  5. 7. week organ of corti present in all turns
  6. 9. organ of corti begins as 2 ridges
  7. 11. ectodermal protrusions from utricle area begin to give rise to ___
  8. 12. week the cochlea has 1 1/2 turns
  9. 13. form from junction between inner and outer ridge
  10. 14. week ossification around membranous labryinth occurs
  11. 16. formed from vells from lateral inner ridge detaching from developing tectorial membrane and end up as flat layer of cuboidal cells
  12. 20. week nerve fibers are morphologically complete
  13. 22. weeks 8&9 for vestib development, vestibular branches of VIII nerve link up with ___ and maculae
  14. 24. cells leave the otic epithelium and form the neurons of the ___ cranial nerve
  15. 25. week inner ear is complete