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Darkfield photomicrographs of trkA-ir fibers. A: Thick trkA-ir fibers distributed within the dorsal endopiriform nucleus. B: TrkA-ir fibers arranged in a loose, disorganized pattern within the hilus of the dentate gyrus of the hippocampus. Note that these fibers do not enter the granular layer of the dentate gyrus (white arrows). Scale bar = 30 μm for A and B.
