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The top documents tagged [presleep stage]
Consciousness, Sleep and Dreaming
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STAGES OF SLEEP. What Happens When We Sleep? Sleep occurs in a recurring cycle of 90 to 110 minutes and is divided into two categories: Non-REM (which
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© 2004 John Wiley & Sons, Inc. Huffman: PSYCHOLOGY IN ACTION, 7E Chapter 7: States of Consciousness
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