CMMB 403 Lecture Notes - Lecture 33: Otic Vesicle, Neurogenic Placodes, Optic Vesicle

• School: University of Calgary
• Department: Cellular, Molecular and Microbial Biology
• Course: CMMB 403
• Professor: John Cobb

Document Summary

The places are epidermal thickenings of the head region that develop into neurons or other parts of the sensory organs. Nasal placode develops into the nasal epithelium. Placodes all come from the surface ectoderm. Except for optic placode, all of them form neurons. Cranial placodes are a very important feature of the ectoderm. 3 subdivisions of ectoderm can all form neurons. Neural crest: forms almost all of pns. Sensory neurons of the head and neck have a combined placodal and neural crest origin. Placode: epidermal thickenings of the head region that develop into neurons or other parts of the sensory organs. The lens placode comes into contact with the optic vesicle, an extension of the early forebrain. The lens vesicle invaginate a bit like the neural tube. As lens placode comes into contact with neural tube (retina) Part of neural tube forms an optic cup, which forms the retina. Expression of the rx genes in vertebrate retina development.