Sleep starts, also known as hypnic jerks, hypnagogic jerks, and predormital myoclonus, are benign, physiological phenomena.1-5 They usually present with motor manifestations of transient body jerks at onset of sleep, and are often triggered by fatigue, stress, and sleep deprivation.1-5Sensory manifestations have been well described as accompaniments of the movements.1 4 5 To our knowledge, the only literature reference to sensory phenomena without a body jerk is an anecdotal comment within a review article.5 We now report on two patients with purely sensory complaints restricted to onset of sleep.

Patient 1, a 42 year old …