Objective To explore the effect of chronic intermittent hypoxia(CIH) on hippocampus neuron and growth associated protein43(GAP-43) in rats.Methods 40 adult male Sprague-Dawley rats were randomly divided into control group,CIH 1 week group,CIH 3 weeks group and CIH 5 weeks group with 10 rats in each group.The CIH groups were exposed to intermittent hypoxia in designed cabin 8 h every day for 1 week,3 weeks and 5 weeks.The pathological changes of hippocampal neurons were observed by HE staining.The GAP-43 exp...