Chapter 54 - Isolated motor phenomena and symptoms of sleep

Abstract

Publisher Summary This chapter illustrates that sleep identifies a natural and healthy, temporary, and periodical state of rest, with suspension of the sensorial functions of the organs of sense, as well as those of the voluntary and rational soul. Several motor phenomena occur during sleep, both physiological and pathological. The International Classification of Sleep Disorders, second edition (ICSD-2) lists sleep disorders within eight categories: (1) insomnias, (2) sleep-related breathing disorders, (3) hypersomnias of central origin not due to a circadian rhythm sleep disorder, sleep-related breathing disorder, or other cause of disturbed nocturnal sleep, (4) circadian rhythm sleep disorders, (5) parasomnias, (6) sleep-related movement disorders, (7) isolated symptoms, apparently normal variants and unresolved issues, and (8) other sleep disorders. Some periodic and aperiodic phenomena of sleep are included within different categories of the ICSD-2, without a unifying classification scheme. These are described with their salient characteristics and distinguishing features, ranging from simple movements or symptoms of sleep up to more complex behaviors classified within the parasomnias.