11. Fig. 7.6 (a) Average proportion of time adults spend daily in REM sleep and NREM sleep. REM periods add up to about 20 percent of total sleep time. (b) Typical changes in stages of sleep during the night. Notice that dreams mostly coincide with REM periods.
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23. Fig. 9-18, p. 289 THIS CHART IS ONLY ACCURATE IF YOU ARE VERY UNHEALTHY OR TAKING PRESCRIPTION MEDICATIONS AND IT DOES NOT REFLECT A POSSIBLE ADOLESCENT INCREASE IN SLEEP TIME
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Notas do Editor
Figure 9.18: Time spent by people of different ages in waking, REM sleep, and NREM sleep . REM sleep occupies about 8 hours a day in newborns but less than 2 hours in most adults. The sleep of infants is not quite like that of adults, however, and the criteria for identifying REM sleep are not the same. (Source: From “Ontogenetic development of human sleep-dream cycle,” by H. P. Roffwarg, J. N. Muzio, and W. C. Dement, Science, 152, 1966, 604–609. Copyright 1966 AAAS. Reprinted by permission.)
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