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refers to the lower, diagonal branch of the arcuate sulcus in the frontal lobe of the macaque. Defined by dissection, it separates the precentral gyrus caudally from the inferior frontal gyrus rostrally ( Martin-2000 ). Architectonically it separates the premotor cortex caudally from the dorsolateral prefrontal cortex rostrally.
It may be homologous to the inferior precentral sulcus of the adult human ( See arcuate sulcus for details. ) Equivalent structures are not found in the smooth cerebral cortex of the rat or mouse ( NeuroNames ).
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