Posterior speech area: comprises the posterior extent of the superior temporal gyrus, Anterior speech area (Broca’s): posterior segment of the inferior frontal gyrus,įormally composed by the pars triangularis (Brodmann area 45) and pars opercularis (Brodmann area 46).Ĭranial connections of this area with the superior and middle frontal gyri (Brodmann area 6, The expression “premotor cortex” often is used to group the SMA and the PMA. It is related to the planning and organization of movement although it seems not to be essential for the function itself. Premotor area (PMA): refers to an imprecisely defined area in the middleīetween the antero-inferior margin of the SMA and the precentral fissure. The most anterior part of the SMA is referred as the pre-SMA which is involved in linguistic planning. The SMA is strongly connected to the contralateral SMA through the corpus callosum. It is related to the trunk and proximal limb function and to the planning of motor movements. Supplementary motor area (SMA): located in the superior frontal gyrus mainly at its medial surface. Primary motor and somatosensory cortex: located anterior and posterior to the central fissure,Ĭorresponding to the precentral and postcentral gyri.Īccording to the Penfield and Rasmussen (1959),īoth have similar representation of the body, opercularis: pars opercularis of F Inf Parietal Sup: superior parietal T Sup: Superior temporal T Mid: middle temporal T Inf: inferior temporal.įissure nomenclare: 1: central 2: superior frontal 3: inferior frontal 4: Silvio 5: superior temporal 6: middle temporal 7: parieto-occipital 8: intraparietal. Gyri nomenclature: F Sup: superior frontal F Mid: middle frontal F Inf: inferior frontal p. 1: Schematic representation of the surface anatomy of the brain from a lateral view.
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