levels of cognitive skills , such
as speech, memory, innovative
and flexible thinking .
3
What would happen if we didn't sleep?
• With continued lack of sufficient sleep, the part of the brain that controls language, menmery, planning and sense of time is severely affected, practically shutting down.
Thescienceofsleep
1
What’s your daily rhythm ?
• Do you consider yourself a morning person or an evening person ?
• At what time of day do you feel at your best? • Considering only your own "feeling best" rhythm, if you
Species Python巨蟒
Average total sleep time per day
18 hrs
Tiger
15.8 hrs
Cat Chimpanzee黑猩猩
12.1 hrs 9.7 hrs
Sheep
3.8 hrs
African elephant Giraffe长颈鹿
3.3 hrs 1.9 hr
• We have around three to five REM episodes a night.