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A) Coronal Nissl-stained section through the rostral AON, showing the location of pars externa (AONe; asterisk) in relation to the olfactory bulb (OB), pars dorsalis and pars lateralis. B) Darkfield photomicrograph of the region indicated in A, showing retrograde fluorogold labeling of cell bodies in pars externa following an injection into contralateral pars dorsalis. Scale bar = 150μm in A, 40μm in B.
