Agranular cortex is a cytoarchitecturally defined term denoting the type of heterotypic cortex that is distinguished by its relative thickness and lack of granule cells. Examples are Brodmann area 30, the agranular insula, and the precentral gyrus, the site of the primary motor cortex. An area of cortex that is only slightly granulated is termed dysgranular.
References
Brodmann K (1909). Beschreibung der einzelnen Hirnkarten IV. Kapitel in Vergleichende Lokalisationslehre der Grosshirnrinde [Localisation in the cerebral cortex : the principles of comparative localisation in the cerebral cortex based on the cytoarchitectonics] (in German). Leipzig: Verlag von Johann Ambrosias Barth. OCLC 310463543. (English translation available as OCLC 262025751 /wiki/OCLC_(identifier) ↩
Carpenter MB; Sutin J (1983). Human Neuroanatomy. Baltimore: Williams and Wilkins Co. OCLC 8346573.{{cite book}}: CS1 maint: multiple names: authors list (link) /wiki/OCLC_(identifier) ↩