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. [ VHOG : 0000117 ]

This is just here as a test because I lose it

Term information

database cross reference
  • EFO:0003455
  • VHOG:0000117
  • AAO:0011036
  • XAO:0000284
  • TAO:0001294
  • ZFA:0001294
  • FMA:293968
Subsets

efo_slim

plural term
epibranchial placodes [ ZFA : 0001294 ]
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.
development notes
  • 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
external 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. [Graham_A, The_development_and_evolution_of_the_pharyngeal_arches._J_Anat_(2001)_199:_133-141][VHOG]
external ontology notes
  • in XAO this develops_from dorsolateral placode, but in NBK53175, this is a separate group
has exact synonym
  • epibranchial placodes
has related synonym
  • ventrolateral placode
homology notes
  • 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]
id
  • UBERON:0003078