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] [ http://en.wikipedia.org/wiki/Otic_placode ]

Synonyms: placoda otica

This is just here as a test because I lose it

Term information

database cross reference

uberon_slim, efo_slim, pheno_slim, vertebrate_core

latin term
placoda otica

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).

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]

has related synonym

ear placode
octaval placode
octaval VIII placode
ear/otic placode
auditory placode

homology notes

We conclude this section by listing some of the many synapomorphies of craniates, including (...) (2) neurogenic placodes (...).[well established][VHOG]