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Map of gyri of human left hemisphere, superimposed on a fixed brain

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Map shows the base of the frontal lobe and the olfactory bulb and tract lying within the olfactory sulcus, between the gyrus rectus (medially) and the orbitofrontal cortex (more laterally). (Source: John A Beal PhD, Department of Cellular Biology & Anatomy, Louisiana State University Health Sciences Center, Shreveport, Louisiana. Creative Commons Attribution 2.5 Generic [CC-BY 2.5] License, https://creativecommons.org/licenses/by/2.5/deed.en). Legend relabeled by Dr. Douglas J Lanska.)