Part I. Overview -- Introduction -- Pathophysiology of parasomnias -- Classificatin of parasomnias -- Diagnosing parasomnias -- Part II. Clinical characteristics of arousal disorders -- Sleepwalking and its variants in adults -- Sleepwalking in children and adolescents -- Sleep terrors and confusional arousals in adults -- Sleep terrors and confusional arousals in children and adolescents -- Part III. Clinical characteristics of sleep-wake transition disorders -- Sleep starts and sleep talking -- Part IV. Clinical characteristics of parasomnias associated with REM sleep -- Physiology and content of dreams -- Nightmare disorders in adults -- Nightmare disorders in children -- Recurrent isolated sleep paralysis (RISP) -- Sleep-related hallucinations -- REM behavior disorder in adults -- REM behavior disorder in children -- Part V. Other parasomnias -- Nocturnal paroxysmal dystonia -- Sleep related dissociative disorders -- Sleep bruxism -- Nocturnal enuresis -- Sleep-related eating disorders: a separate entity or part of the NES clinical spectrum? -- Parasomnia overlap disorder -- Part VI. Neurological, psychiatric and medical disorders presenting as parasomnias -- Neurological conditions associated with parasomnias -- Psychiatric disorders presenting with parasomnias -- Medical disorders presenting with parasomnias -- Parasomnias caused by other conditions -- Part VIII. Interventions for parasomnias -- Treatment of parasomnias -- Use of alternative medicines in parasomnias for adults and children -- Part VIII. Medioclegal aspects -- Sexxomnia: a medicolegal case-based approach in analyzing potential sleep-related abnormal sexual behaviors -- Forensic aspects of the parasomnias