orthodox sleep   (TTS Sound)

The orthodox_sleep has 1 Senses.

• orthodox sleep, nonrapid eye movement, nrem, nonrapid eye movement sleep, nrem sleep
• 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
• 繰り返し起こる睡眠状態で急速眼球運動が起こらず夢も見ない