otic placode

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]. Every claim on this page comes from the Leumas anatomy graph and carries its source.

What the otic placode is

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]. The atlas records it as a region at the region scale in the human body.

Where the otic placode is

It sits in the head, within the sensory system. Not positioned individually. Drawn inside the structure this dataset says contains it — the containment is asserted, the exact spot within it is not.

What the otic placode connects to

The atlas records 9 typed relationships for it, across 4 kinds of connection. part of craniocervical region, ear and ectoderm, and 2 more.

Supply and innervation

This dataset asserts no arterial supply, venous drainage or innervation for the otic placode. Only a minority of structures carry those edges here, so an empty answer means nothing has been recorded — not that there is nothing to record.

Also called

Also recorded as placoda otica, auditory placode, ear placode, ear/otic placode, octaval VIII placode and octaval placode. Searching any of those names reaches this page.

Source

Uberon multi-species anatomy ontology (Mungall et al.), CC BY 4.0. Term UBERON:0003069, version 2026-06-19, retrieved 2026-08-24. Licence: CC-BY-4.0.

Questions

Where is the otic placode?

It sits in the head, within the sensory system. Not positioned individually. Drawn inside the structure this dataset says contains it — the containment is asserted, the exact spot within it is not.

What does the otic placode connect to?

Part of: craniocervical region, ear, ectoderm, embryo and head.

Is the otic placode the same in other species?

Leumas holds the same relationship vocabulary for every species it carries, so where another dataset records this structure you can put the two side by side on /compare.