arrow

From NeuroLex

(Redirected from Birnlex 1735)
Jump to: navigation, search



Brodmann (1909) area 4

Name: Brodmann (1909) area 4
Description: The term area 4 of Brodmann-1909 refers to a cytoarchitecturally defined portion of the frontal lobe of the guenon. It is located predominantly in the precentral gyrus. Brodmann-1909 regarded it as topographically and cytoarchitecturally homologous to the human gigantopyramidal area 4 and noted that it occupies a much greater fraction of the frontal lobe in the monkey than in the human. Distinctive features (Brodmann-1905): the cortex is unusually thick; the layers are not distinct; the cells are relatively sparsely distributed; giant pyramidal (Betz) cells are present in the internal pyramidal layer (V); lack of an internal granular layer (IV) such that the boundary between the external pyramidal layer (III) and the internal pyramidal layer (V) is indistinct; lack of a distinct external granular layer (II); a gradual transition from the multiform layer (VI) to the subcortical white matter.
Synonym(s): Brodmann area 4, Area gigantopyramidalis, gigantopyramidal, area 4 of Brodmann-1909, Brodmann.4, M1, Primary Motor cortex
Abbreviation: B09-4
Super-category: Brodmann partition scheme region
*Id: birnlex_1735
Link to OWL / RDF: Download this content as OWL/RDF
Neuronames ID ( what's this?): 1043


  • Externally Sourced Definition: The term area 4 of Brodmann-1909 refers to a cytoarchitecturally defined portion of the frontal lobe of the guenon. It is located predominantly in the precentral gyrus. Brodmann-1909 regarded it as topographically and cytoarchitecturally homologous to the human gigantopyramidal area 4 and noted that it occupies a much greater fraction of the frontal lobe in the monkey than in the human. Distinctive features (Brodmann-1905): the cortex is unusually thick; the layers are not distinct; the cells are relatively sparsely distributed; giant pyramidal (Betz) cells are present in the internal pyramidal layer (V); lack of an internal granular layer (IV) such that the boundary between the external pyramidal layer (III) and the internal pyramidal layer (V) is indistinct; lack of a distinct external granular layer (II); a gradual transition from the multiform layer (VI) to the subcortical white matter.
  • Abbreviation Source: SumsDB_abbrevSource

Contributors

Ayslinn, Nifbot2, Slarson



bookmark

*Note: Neurolex imports many terms and their ids from existing community ontologies, e.g., the Gene Ontology. Neurolex, however, is a dynamic site and any content beyond the identifier should not be presumed to reflect the content or views of the source ontology. Users should consult with the authoritative source for each ontology for current information.

Facts about Brodmann (1909) area 4RDF feed
AbbrevB09-4  +
AbbrevSourceSumsDB_abbrevSource  +
Created2 October 2007  +
CurationStatusuncurated  +
DefinitionThe term area 4 of Brodmann-1909 refers to The term area 4 of Brodmann-1909 refers to a cytoarchitecturally defined portion of the frontal lobe of the guenon. It is located predominantly in the precentral gyrus. Brodmann-1909 regarded it as topographically and cytoarchitecturally homologous to the human gigantopyramidal area 4 and noted that it occupies a much greater fraction of the frontal lobe in the monkey than in the human. Distinctive features (Brodmann-1905): the cortex is unusually thick; the layers are not distinct; the cells are relatively sparsely distributed; giant pyramidal (Betz) cells are present in the internal pyramidal layer (V); lack of an internal granular layer (IV) such that the boundary between the external pyramidal layer (III) and the internal pyramidal layer (V) is indistinct; lack of a distinct external granular layer (II); a gradual transition from the multiform layer (VI) to the subcortical white matter. ayer (VI) to the subcortical white matter.
DefinitionSourceNeuroNames  +
EditorialNoteThe lobular mapping of Brodmann areas has The lobular mapping of Brodmann areas has been adapted from the LOCATION hierarchy in Brainmap.org. To date (2007-10-02) this only define the set of lateralized cerebral lobe locations where a given Brodmann area is located. The intension is to eventually incorporate the more detailed gyri and sulci relations as well. detailed gyri and sulci relations as well.
ExternallySourcedDefinitionThe term area 4 of Brodmann-1909 refers to The term area 4 of Brodmann-1909 refers to a cytoarchitecturally defined portion of the frontal lobe of the guenon. It is located predominantly in the precentral gyrus. Brodmann-1909 regarded it as topographically and cytoarchitecturally homologous to the human gigantopyramidal area 4 and noted that it occupies a much greater fraction of the frontal lobe in the monkey than in the human. Distinctive features (Brodmann-1905): the cortex is unusually thick; the layers are not distinct; the cells are relatively sparsely distributed; giant pyramidal (Betz) cells are present in the internal pyramidal layer (V); lack of an internal granular layer (IV) such that the boundary between the external pyramidal layer (III) and the internal pyramidal layer (V) is indistinct; lack of a distinct external granular layer (II); a gradual transition from the multiform layer (VI) to the subcortical white matter. ayer (VI) to the subcortical white matter.
Idbirnlex_1735  +
LabelBrodmann (1909) area 4  +
ModifiedDate26 April 2010  +
NeuronamesLinkhttp://braininfo.rprc.washington.edu/Scripts/hiercentraldirectory.aspx?ID=1043  +
SuperCategoryBrodmann partition scheme region  +
SynonymBrodmann area 4  +, Area gigantopyramidalis  +, gigantopyramidal  +, area 4 of Brodmann-1909  +, Brodmann.4  +, M1  +, and Primary Motor cortex  +
UmlscuiC1272526  +