Brodmann area 9
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| Brain: Brodmann area 9 | ||
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| Latin | Area frontalis granularis | |
| NeuroLex ID | birnlex_1740 | |
Contents |
[edit] Human
Brodmann area 9, or BA9, is part of the frontal cortex in the human brain. It contributes to the dorsolateral prefrontal cortex.
[edit] Guenon
The term Brodmann area 9 refers to a cytoarchitecturally defined portion of the frontal lobe of the guenon. Brodmann-1909 regarded it on the whole as topographically and cytoarchitecturally homologous to the granular frontal area 9 and frontopolar area 10 in the human. Distinctive features (Brodmann-1905): Unlike Brodmann area 6-1909, area 9 has a distinct internal granular layer (IV); unlike Brodmann area 6 or Brodmann area 8-1909, its internal pyramdal layer (V) is divisible into two sublayers, an outer layer 5a of densely distributed medium-size ganglion cells that partially merges with layer IV, and an inner, clearer, cell-poor layer 5b; the pyramidal cells of sublayer 3b of the external pyramidal layer (III) are smaller and sparser in distribution; the external granular layer (II) is narrow, with small numbers of sparsely distributed granule cells.
[edit] Image
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Animation.
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front view.
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Lateral view.
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Medial view.
[edit] External links
- For Neuroanatomy of this area see BrainInfo
It is the medial prefrontal cortex.
[edit] See also
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