OB=Olfactory Bulb

PC=Piriform Cortex

Notes about images:

1. WPA: highlight section around PNNs
2. DAPI: visualize all cells
3. cFos: neurons that are firing

Allen Brain Atlas: Coronal Atlas (http://mouse.brain-map.org/experiment/thumbnails/100048576?image_type=atlas)

*Focus on Piriform area while counting