2012 Group Project 6
Hearing Development
Introduction
History
Adult Anatomy and Histology
Development
Outer Ear
Middle Ear
Inner Ear
The entire inner ear, as well as the neurons which innervate the sensory organ, are derived from the otic placode. The otic placode is a thickened portion of ectoderm located on the each side of the developing head of the embryo, next to the hindbrain. It is generally visible after gastrulation, once the first 5 to 10 pairs of somites have formed. Invagination occurs next, which creates the otocyst - a vesicle which will develop into the different components of the inner ear: the cochlea, the semicircular canals with cristae, the utricle, the saccule and the vestibulo-acoustic ganglion. [1]
Induction of the otic placode
Experiments with molecular markers have revealed that several steps are needed for induction of the otic placode. We will consider the three major steps:
1 Pre-placodal domain
2 Pre-otic field
3 Otic placode/epidermis fate decision
Abnormal Hearing
Technologies to detect
Technologies to overcome the problems
Current Research
Glossary
References
- ↑ <pubmed>17891709</pubmed>
External Links
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2012 Projects: Vision | Somatosensory | Taste | Olfaction | Abnormal Vision | Hearing