9781422285770

CHAPTER ONE

S L E E P — W H A T I S I T G O O D F O R ?

Words to Understand circadian: natural process that happens on a 24-hour cycle.

deprivation: a hurtful lack of something important. insomnia: inability to fall asleep and/or stay asleep. paralysis: inability to move. rhythm: a repeating order of some activity or process.

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