The Epley maneuver or repositioning maneuver is a maneuver used to treat benign paroxysmal positional vertigo of the posterior or anterior canals. It works by allowing free floating particles from the affected semicircular canal to be relocated, using gravity, back into the utricle, where they can no longer stimulate the cupula, therefore relieving the patient of bothersome vertigo. It is often performed by a physical therapist, after confirmation of a diagnosis of BPPV by a medical doctor, and has a reported success rate of between 90–95%. This maneuver was developed by Dr. John Epley and first described in 1980. The goal of the Epley maneuver is to restore equilibrium of the vestibular system.