SLEEP DISORDERS
\slˈiːp dɪsˈɔːdəz], \slˈiːp dɪsˈɔːdəz], \s_l_ˈiː_p d_ɪ_s_ˈɔː_d_ə_z]\
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Conditions characterized by disturbances of usual sleep patterns or behaviors. Sleep disorders may be divided into three major categories: DYSSOMNIAS (i.e. disorders characterized by insomnia or hypersomnia), PARASOMNIAS (abnormal sleep behaviors), and sleep disorders secondary to medical or psychiatric disorders. (From Thorpy, Sleep Disorders Medicine, 1994, p187)
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