I think the cerebellum is one of the prettiest parts of the brain (for basic anatomy, go here). This is an image of the cerebellum showing purkinje cells in yellow and their outputs (axons that will take the information to the brain) in red. For more information about the cerebellum and purkinje cells, check out my post here. I love this image- all you can see is neurons, but you can see how compact they are on the outer layers of the tissue (just like cortex! They make up the gray matter.) and how the axons travel in the middle parts (just like the rest of the brain! They make up the white matter).
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