What Is a Hypnagogic Jerk and What Causes Sleep Starts?
Table of ContentsView All View All Table of Contents Hypnagogic vs. Hypnic Jerks Why Sleep Starts Occur Further Evaluation Frequently Asked Questions Just after falling asleep, you may wake with a sudden jerking movement. What causes these so-called sleep starts? Learn about hypnagogic jerks, or hypnic jerks, including the most common symptoms, and whether further evaluation and treatment may be necessary. Justin Case / The Image Bank / Getty Images...