Neuronal cells containing nos have been found in basal forebrain , pedunculopontine tegmental nuclei , dorsal raphe nuclei , olfactory bulb and hippocampus which have been proved to participate in the regulation of sleep / waking cycle Nos在中樞神經(jīng)系統(tǒng)中分布廣泛,與睡眠有關(guān)的部位,如前腦基底部、腦橋背蓋、中縫背核、嗅球和海馬等均有較高密度的nos ,說明這些部位可以產(chǎn)生no 。