A frontal cortical gyrus containing anatomically and functionally distinguishable subregions. Its left pars opercularis and pars triangularis are commonly associated with Broca's area.
A traditional label for left inferior-frontal territory, commonly associated with areas 44 and 45. It is heterogeneous: language-selective and domain-general regions can lie beside one another, and an anatomical label does not establish a single syntax function. The name commemorates Paul Broca.
The pars triangularis is the triangular part of the inferior frontal gyrus, between neighboring sulcal boundaries. Its anatomical identification is distinct from a claim that one sharply bounded language function resides entirely within it.
The pars opercularis is the posterior opercular part of the inferior frontal gyrus. It participates in networks involving language and action, but its contribution depends on task and connections. An anatomical label and a functional activation contrast answer different questions.
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