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CROSS-SPECIES ANATOMY - ANNOTATIONS

The Basic subset of the UBERON integrated, cross-species anatomy ontology is downloaded weekly from http://berkeleybop.org/ontologies/uberon/basic.obo. For more information about this ontology see the "About" page on the UBERON website at http://uberon.github.io/about.html.
Term:prechordal plate
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Accession:UBERON:0003063 term browser browse the term
Definition:A horseshoe-shaped thickening of the endoderm at the cranial (rostral) end of the primitive streak formed by the involution of Spemann's organizer cells which, together with the notochord, induces the formation of the neural plate from the overlying ectodermal cells and contributes mesodermal type cells to the surrounding tissue.
Comment:[homology-note] "There are two opposing models that can potentially explain the differences in gsc (goosecoid) expression between amphioxus and vertebrates. In one model, the vertebrate gsc expression pattern more closely resembles the common ancestral state and the amphioxus gsc expression pattern is a derivation associated with its unique morphology. (...) In an alternate model, the amphioxus gsc expression pattern most closely represents the common ancestral state and the vertebrate pattern is derived. This model suggests that the evolution of vertebrates was accompanied by the segregation of gsc expression, from a more general domain underlying the entire brain anlage to a distinct forebrain organizer domain and subsequent prechordal plate. We feel this second model is more parsimonious than the first model in that what would be novel anterior gsc expression in vertebrates directly correlates with a novel vertebrate anterior structure, the prechordal plate.[well established][VHOG]" xsd:string {date_retrieved="2012-09-17", external_class="VHOG:0000086", ontology="VHOG", source="DOI:10.1046/j.1525-142x.2000.00073.x Neidert AH, Panopoulou G and Langeland JA, Amphioxus goosecoid and the evolution of the head organizer and prechordal plate. Evolution and Development (2008)", source="http://bgee.unil.ch/"}
Synonyms:broad_synonym: head mesenchyme;   head mesoderm
 alt_id: UBERON:0004881
 xref: AAO:0011085;   EHDAA2:0001493;   EHDAA:181;   FMA:295532;   TAO:0000060;   VHOG:0000086;   Wikipedia:Prechordal_plate;   XAO:0000079;   ZFA:0000060

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Term paths to the root
Path 1
Term Annotations click to browse term
  UBERON ontology 0
    anatomical entity 0
      material anatomical entity 0
        developing anatomical structure 0
          embryonic structure 0
            prechordal plate 0
              head mesenchyme from mesoderm + 0
              polster 0
Path 2
Term Annotations click to browse term
  UBERON ontology 0
    anatomical entity 0
      material anatomical entity 0
        anatomical structure 0
          multicellular anatomical structure 0
            multicellular organism 0
              embryo 0
                embryonic structure 0
                  epiblast (generic) 0
                    germ layer / neural crest 0
                      germ layer 0
                        mesoderm 0
                          axial mesoderm 0
                            prechordal mesoderm 0
                              prechordal plate 0
                                head mesenchyme from mesoderm + 0
                                polster 0
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