Sleep is largely driven by the bodyรขโ‚ฌโ„ขs internal clock, which takes cues from external elements such as sunlight and temperature. The bodyรขโ‚ฌโ„ขs natural sleep-and-wake cycle is reasonably attuned to Throughout your time asleep, your brain will cycle repeatedly through two different types of sleep:

The first part of the cycle is non-rem sleep, which รขโ‚ฌยฆ Sleep is a state of reduced mental and physical activity in which consciousness is altered and certain sensory activity is inhibited. During sleep, there is a marked decrease in muscle activity and รขโ‚ฌยฆ