Sleep movement disorders and neurologic movement disorders

Movement during sleep is both normal and abnormal. We are only beginning to understand the underlying pathophysiology of sleep movement disorders. Neurologic movement disorders are perhaps better understood and most have underlying genetic causes or predilections. Worsening of sleep and consequent daytime sleepiness with progression of these disorders is the rule rather than the exception. Medications for the primary disorders may worsen sleep or even induce sleep disorders. There is much to learn in the future. We are only scratching the surface of this fascinating field of medicine.