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Illustration of method for constructing flat maps of fMRI signal in the glomerular layer by using the software program odormapbuilder. (a) Glomerular layer outlined on the anatomical MRI image of the OB. (b) fMRI signal from a typical trial of odor stimulation (heptanal). (c) Superposition of b over a. (Scale bar = 500 μm.) (d) Dorsal-centered map. (e) Ventral-centered map. A, anterior; P, posterior; D, dorsal; M, medial; V, ventral; L, lateral.
