This image shows two β-lobe neurons (one colored here blue, one orange), which process olfactory information in the locust brain. Also visible in color (toward the top) is the mushroom body, a brain area associated with learning and memory. The β-lobe neurons were visualized by intracellular injection with neurobiotin. The mushroom body was visualized by mass fill with a dextran dye and imaged so that deeper parts are more blue and parts closer to the surface are red. The image is a composite of several different confocal pictures registered to the same locust brain (light gray). Credits: Nitin Gupta and Mark Stopfer, NICHD

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