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After 24 nights of study on hydranencephalic infants and their controls, it was concluded that REMs occur in hydranencephaly. Thus it is also concluded that although a cortex is not needed, the eye movements may be needed and thus may be associated with basic vegetative processes. Study on narcoleptics and their controls over 17 nights revealed no significant difference in blood glucose values in either deep sleep or dreaming sleep phases. Thus, some changes in nocturnal sleep phases of narcoleptics are not reflected by blood glucose alterations.
Pierce et al. (Fri,) studied this question.