a recurring sleep state during which rapid eye movements do not occur and dreaming does not occur; accounts for about 75% of normal sleep time
[ Syn: orthodox sleep , nonrapid eye movement sleep , nrem sleep , nonrapid eye movement , nrem ]
a recurring sleep state during which rapid eye movements do not occur and dreaming does not occur; accounts for about 75% of normal sleep time
[ Syn: orthodox sleep , nonrapid eye movement sleep , nrem sleep , nonrapid eye movement , nrem ]