In the course of experiments on the induction of sleep in nonepileptic persons by means of an apparatus described in a paper previously published,1 it appeared that the induced sleep was unlike ordinary sleep in that it was, so far as could be observed, largely devoid of phenomena of release. For instance, it is a common observation that when a person lies down to sleep he very rarely falls asleep in the position in which he first lay down. He usually turns one or more times, flexes and extends his body and limbs, and falls asleep in a given habitual posture. If one tries, by way of experiment, to fall asleep flat on the back with the body and limbs extended, unless such a posture is habitual, one will be convinced of the difficulty of the attempt as well as of the important part that phenomena of release play
ROSETT J. INDUCTION OF SLEEP IN EPILEPTIC PERSONS. Arch NeurPsych. 1931;26(1):131–140. doi:10.1001/archneurpsyc.1931.02230070137007
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