Figure 3From: Topography-specific spindle frequency changes in Obstructive Sleep ApneaAn anterior-posterior slow spindle gradient was present, but attenuated in OSA patients, in comparison to non-OSA subjects. For Moderate OSA, slow spindle percentage was reduced in centro-parietal, but not in frontal regions as the night progressed. In contrast, non-OSA subjects showed reduced slow spindle percentages in frontal as well as centro-parietal regions across the night.Back to article page