Preferred Label : epibranchial placode;
Uberon definition : Focal thickenings of the embryonic ectoderm that form immediately dorsal and caudal
of the clefts between the pharyngeal arches and that produce the neuroblasts that
migrate and condense to form the distal cranial ganglia.;
Uberon synonym : epibranchial placodes;
Uberon related term : ventrolateral placode;
Uberon Development note : Epibranchial placodes-derived neurons innervate internal organs to transmit information
such as heart rate, blood pressure, and visceral distension from the periphery to
the central nervous system (Baker and Bronner-Fraser, 2001). From rostral to caudal
the epibranchial placodes comprise the geniculate, petrosal, and nodose placodes,
each associated in sequence with the first, second and third branchial clefts. Each
placode contributes sensory neurons to cranial nerves VII (facial nerve), IX (glossopharyngeal
nerve), and X (vagal nerve), respectively;
Uberon Homology note : These (the epibranchial placodes) are focal thickenings of the embryonic ectoderm
that form immediately dorsal and caudal of the clefts between the pharyngeal arches
in all vertebrates, and they produce the neuroblasts which migrate and condense to
form the distal cranial ganglia: the geniculate, petrosal and nodose ganglia. (...)
The one substantial difference between the vertebrate pharyngeal arches and those
of the protochordates is the presence of the epibranchial placodes but the evolution
of these structures was undoubtedly driven by the endoderm.[well established][VHOG];
Origin ID : 0003078;
Automatic exact mappings (from CISMeF team)
- Uberon cross reference
- develops from
- develops into
- dorsal to
- has potential to developmentally contribute to
- part of
- ventral to
Focal thickenings of the embryonic ectoderm that form immediately dorsal and caudal
of the clefts between the pharyngeal arches and that produce the neuroblasts that
migrate and condense to form the distal cranial ganglia.
