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refers to a short groove embedded in the middle frontal gyrus of the human. Located rostral to the intermediate precentral sulcus, it runs parallel to the superior frontal sulcus above and the inferior frontal sulcus below ( Ono-1990 ). It is not found in the macaque, and an equivalent structure is not found in the smooth cerebral cortex of the rat or mouse ( NeuroNames ).
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refers to a sulcus found in 68% of human brains. Parallel to the longitudinal fissure and the superior frontal sulcus it is located within the superior frontal gyrus anterior to the, also variably present, marginal precentral sulcus ( Ono-1990 ).
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