inferior ramus of the arcuate sulcus
Acronym: iras
The term inferior ramus of the arcuate sulcus 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 secondary motor 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 ).

Also known as: inferior arcuate sulcusNeuroNames ID : 65

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