principal sulcus
Acronym: prs
The term principal sulcus refers to a superficial feature of the frontal lobe of the macaque. Located on the dorsolateral surface, it is a horizontal groove extending toward the frontal pole from the angle of the arcuate sulcus ( Krieg-1975; Walker-1940 ). The adult human brain has no feature topologically equivalent to it ( Matelli-2004 ). While the fetal cortex of the 32-33 week human has such a feature, it is more likely homologous to the inferior frontal sulcus of the adult human ( Savel'ev-2005 ). It is not present in the smooth cerebral cortex of the rat or the mouse ( NeuroNames ).

Also known as: rectus sulcus, Sulcus principalisNeuroNames ID : 66

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