Hypnagogic which is also term `hypnic jerk' is a common attribute exhibited by every living things including man and other animals.According to many hypnagogic jerk is a sleep disorder,what is sleep disorder? sleep disorder also `somnipathy' is a medical disorder of the sleep pattern of a person or animals.Therefore, Hypnagogic Jerk is an involuntary twitch which occurs at the onset of sleep,leading to a sudden awaken for a moment.Physically, it is of resemblance with "jump experience" with someone when startled.It is associated with perspiration, sensory feeling of shock or falling into void.According to a study on sleep disturbance reached by Journal of Neural Transmission, it occurs during Non-Rapid Eye Movement(NREM) sleep cycle, which is also an abrupt muscle flexing movement, generalise and asymmetric which may cause arousal with an illusion of falling.Its resulted from a wide range of potential cause;stress, anxiety.Hypnic jerk is not a sleep disorder due to,it does not involve a medical disorder...Hypnagogic which is also term `hypnic jerk' is a common attribute exhibited by every living things including man and other animals.According to many hypnagogic jerk is a sleep disorder,what is sleep disorder? sleep disorder also `somnipathy' is a medical disorder of the sleep pattern of a person or animals.Therefore, Hypnagogic Jerk is an involuntary twitch which occurs at the onset of sleep,leading to a sudden awaken for a moment.Physically, it is of resemblance with "jump experience" with someone when startled.It is associated with perspiration, sensory feeling of shock or falling into void.According to a study on sleep disturbance reached by Journal of Neural Transmission, it occurs during Non-Rapid Eye Movement(NREM) sleep cycle, which is also an abrupt muscle flexing movement, generalise and asymmetric which may cause arousal with an illusion of falling.Its resulted from a wide range of potential cause;stress, anxiety.Hypnic jerk is not a sleep disorder due to,it does not involve a medical disorder...Hypnagogic which is also term `hypnic jerk' is a common attribute exhibited by every living things including man and other animals.According to many hypnagogic jerk is a sleep disorder,what is sleep disorder? sleep disorder also `somnipathy' is a medical disorder of the sleep pattern of a person or animals.Therefore, Hypnagogic Jerk is an involuntary twitch which occurs at the onset of sleep,leading to a sudden awaken for a moment.Physically, it is of resemblance with "jump experience" with someone when startled.It is associated with perspiration, sensory feeling of shock or falling into void.According to a study on sleep disturbance reached by Journal of Neural Transmission, it occurs during Non-Rapid Eye Movement(NREM) sleep cycle, which is also an abrupt muscle flexing movement, generalise and asymmetric which may cause arousal with an illusion of falling.Its resulted from a wide range of potential cause;stress, anxiety.Hypnic jerk is not a sleep disorder due to,it does not involve a medical disorder...