From NeuroLex

• ID: birnlex_1752

• Synonym: Area temporalis media

• Synonym: Brodmann area 21, middle temporal

• Synonym: Brodmann.21

• Synonym: area 21 of Brodmann-1909

• Neuro Names ID: 1054

• Neuro Names Link: http://braininfo.rprc.washington.edu/Scripts/hiercentraldirectory.aspx?ID=1054

• Editorial Note: 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.

• Externally Sourced Definition: The term area 21 of Brodmann-1909 refers to a subdivision of the cerebral cortex of the guenon defined on the basis of cytoarchitecture. It is cytoarchitecturally homologous to the middle temporal area 21 of the human (Brodmann-1909). Distinctive features (Brodmann-1905): Compared to area 20 of Brodmann-1909, the total cortical thickness of area 21 is greater, the granular cells are less abundant, and the boundary with the subcortical white matter is less distinct; the molecular layer (I) is wider; the pyramidal cells of sublayer 3b of the external pyramidal layer (III) are larger; the internal granular layer (IV) is less developed and contains fewer cells; ganglion cells of the internal pyramidal layer (V) are larger, rounder, and densely arrayed adjacent to layer IV; the boundary between layer V and the multiform layer (VI) is indistinct; and layer VI is wider and has no sublayers.

• Definition Source: http://purl.org/nbirn/birnlex/ontology/annotation/BIRNLex_annotation_properties.owl#NeuroNames

• UMLSCUI: C1272539

• Modified Date: 2007-10-02

• Curator: http://purl.org/nbirn/birnlex/ontology/annotation/BIRNLex_annotation_properties.owl#Bill_Bug

• Created Date: 2007-10-02