Preferred Label : primary somatosensory cortex;
Uberon definition : (Chapin & Lin, 1984, rat): the region considered as the SI cortex is not a cytoarchitecturally
homogeneous structure but consists instead of a patchwork array of areas containing
dense aggregations of layer IV granule cells, surrounded by granule-cell-sparse regions.
As was shown by Welker (b71,b76), and in our own mapping studies (see Fig. 3), this
discontinuous pattern of granular, or koniocortical, zones contains within itself
a map of the ratbs cutaneous periphery. There are clear subtypes within this cytoarchitectural
subregion, notably including the bgranular aggregateb type of cytoarchitecture characteristic
of the paw, limb, and mystacial vibrissae areas, and the bbarrel-fieldb type (originally
described by Woolsey and Van der Loos, b70) seen in the nose and perioral regions.
In the mouse, but not the rat, such barrels also cover the whole whisker representation
(Welker and Woolsey, b74).;
Uberon synonym : somatosensory area 1; primary somatosensory cortex (area S1, areas 3,1,2);
Uberon related term : primary somatosensory area; S1C; postcentral gyrus;
Uberon broad term : S1;
Origin ID : 0008933;
has part
- part of
(Chapin & Lin, 1984, rat): the region considered as the SI cortex is not a cytoarchitecturally
homogeneous structure but consists instead of a patchwork array of areas containing
dense aggregations of layer IV granule cells, surrounded by granule-cell-sparse regions.
As was shown by Welker (b71,b76), and in our own mapping studies (see Fig. 3), this
discontinuous pattern of granular, or koniocortical, zones contains within itself
a map of the ratbs cutaneous periphery. There are clear subtypes within this cytoarchitectural
subregion, notably including the bgranular aggregateb type of cytoarchitecture characteristic
of the paw, limb, and mystacial vibrissae areas, and the bbarrel-fieldb type (originally
described by Woolsey and Van der Loos, b70) seen in the nose and perioral regions.
In the mouse, but not the rat, such barrels also cover the whole whisker representation
(Welker and Woolsey, b74).
