Figure 15From: A comparative analysis of the distribution of immunoreactive orexin A and B in the brains of nocturnal and diurnal rodentsCerebral cortex. Photomicrographs of orexin A fibers in the somatosensory cortex of the Long-Evans rat (A), grass rat (B), Syrian hamster (C), and degu (D). I-VI: Cortical layers 1–6. Scale bar = 300 μm.Back to article page