Figure 14From: A comparative analysis of the distribution of immunoreactive orexin A and B in the brains of nocturnal and diurnal rodentsXiphoid nucleus. Photomicrographs of orexin A fibers in the xiphoid nucleus (Xi) of the Long-Evans rat (A), grass rat (B), Syrian hamster (C), and degu (D). Note relative lack of orexin fibers in the degu Xi in comparison with the other three species. 3V: third ventricle. Scale bar = 200 μm.Back to article page