loading...| Preferred Name |
otic placode |
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| Synonyms |
placoda otica ear placode auditory placode octaval VIII placode octaval placode ear/otic placode |
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| Definitions |
A cranial placode which, once specified, invaginates to form an otic cup, which eventually separates from the surface ectoderm to form the otic vesicle or otocyst, a rounded structure without appar- ent polarity. As the otic placode invaginates into a cup neuroblasts delaminate from the anterior ventral aspect of the otic epithelium to give rise to neurons of the vestibulocochlear (statoacoustic) ganglion of cranial nerve VIII[NBK]. |
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| ID |
http://purl.obolibrary.org/obo/UBERON_0003069 |
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| database_cross_reference |
NCIT:C34239 ZFA:0000138 EFO:0003429 UMLS:C1518677 AAO:0011079 TAO:0000138 EHDAA2:0001339 XAO:0000223 Wikipedia:Otic_placode EMAPA:16195 VHOG:0000235 EHDAA:506 FMA:293973 |
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| definition |
A cranial placode which, once specified, invaginates to form an otic cup, which eventually separates from the surface ectoderm to form the otic vesicle or otocyst, a rounded structure without appar- ent polarity. As the otic placode invaginates into a cup neuroblasts delaminate from the anterior ventral aspect of the otic epithelium to give rise to neurons of the vestibulocochlear (statoacoustic) ganglion of cranial nerve VIII[NBK]. |
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| development_notes |
With the exception of the pigment cells of the stria vascularis and the secretory epithelium of the cochlea, which are of neural crest origin, all compo- nents of the inner ear derive from the otic placode. In most species the thickening of the ectoderm into a placode occurs in a region adjacent to rhombomere 5 (reviewed in Ohyama et al., 2007), while in amphibians the otic placode is centered onto rhombomere 4 (Ruiz i Altaba and Jessell, 1991). |
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| external_definition |
Primordium of the ear epithelium before it hollows into the otic vesicle, present beside the hindbrain rudiment in the midsegmentation period. Kimmel et al, 1995. (Also see Anatomical Atlas entry for ear by T. Whitfield.)[TAO] |
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| has_exact_synonym |
placoda otica |
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| has_obo_namespace |
uberon |
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| has_related_synonym |
ear placode auditory placode octaval VIII placode octaval placode ear/otic placode |
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| homology_notes |
We conclude this section by listing some of the many synapomorphies of craniates, including (...) (2) neurogenic placodes (...).[well established][VHOG] |
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| id |
UBERON:0003069 |
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| in_subset |
http://purl.obolibrary.org/obo/uberon/core#efo_slim http://purl.obolibrary.org/obo/uberon/core#vertebrate_core |
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| label |
otic placode |
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| notation |
UBERON:0003069 |
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| part_of | ||
| prefLabel |
otic placode |
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| treeView | ||
| subClassOf |