This book delves into the uncovered world of sleep in patients affected by neurological disorders and further explores those night hours that may be precious restoring sources of healing or else confirm, or exacerbate, daytime neurological symptoms. Within the gamut of abnormal movements during sleep, disorders such as epilepsy or Parkinson's, dementia or Guillain Barré Syndrome (GBS) will contribute to a spectrum of described nocturnal behavioural patterns or seizures, which may represent important clues in the quest for understanding and treating these syndromes. Addressing night symptoms and sleep disturbance must be recognised as an important part of treatment since sleep alterations highly impact subjective feelings of well-being and quality of life in patients with chronic neurological disorders.