The inferior frontal gyrus is a gyrus situated in the frontal lobe of the cerebrum. It lies between the middle frontal gyrus and the precentral frontal gyrus. The inferior frontal gyrus limited by the inferior frontal sulcus and the inferior border the lateral sulcus, and the inferior precentral sulcus. The Broca´s area, the speech pruduction center, is located in the inferior frontal gyrus.
The inferior frontal gyrus is subdivided into the following macroanatomical structures: 1) Pars opercularis (cortex posterior to the ascending ramus of the lateral fissure); 2) Pars triangularis (cortex between the ascending ramus and the horizontal ramus of the lateral fissure); Pars orbitalis (cortex inferior and anterior to the horizontal ramus of the lateral fissure).
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