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Left: Primary olfactory receptor neurons originate in the superior nasal cavity and project axons through the cribriform plate into the cranium, where they terminate in the overlying olfactory bulb (Patrick J. Lynch, medical illustrator; C. Carl Jaffe, MD, cardiologist. http://creativecommons.org/licenses/by/2.5/). Right: Ventral surface of the brain, showing the olfactory bulbs (arrows) and olfactory tracts projecting to the ipsilateral medial temporal lobe.
