Figure 11From: A comparative analysis of the distribution of immunoreactive orexin A and B in the brains of nocturnal and diurnal rodentsLateral mammillary nucleus. Photomicrographs of orexin A fibers in the lateral mammillary nucleus (LM) of the Long-Evans rat (A), grass rat (B), Syrian hamster (C), and degu (D). Note higher density of orexin fibers in the hamster LM in comparison with the other three species. MM: medial mammillary nucleus. Scale bar = 200 μm.Back to article page