health professionals, or taught to people to perform at home, or both. Postural restriction after the Epley maneuver increases its effect somewhat. When practiced at home, the Epley maneuver is more effective than the Semont maneuver. An effective repositioning treatment for posterior canal BPPV is the therapist-performed Epley combined with home-practiced Epley maneuvers. Although follow-up by using home-practiced HSM instead of Epley has better long-term success, with less discomfort, and less risk of causing subsequent horizontal canal BPPV (H-BPPV). Devices such as the DizzyFIX can help users conduct the Epley maneuver at home, and are available for the treatment of BPPV. Half Somersault Maneuver The Half Somersault Maneuver (HSM) is a patient-performed alternative to the Epley for posterior canal BPPV (PC-BPPV) Like the Epley, it uses gravity to move the calcium crystal build-up from the posterior semicircular canal that causes the condition. Compared to the Epley, HSM has better long-term success, with less discomfort, and less risk of causing subsequent horizontal canal BPPV (H-BPPV). Lempert maneuver or Roll maneuver For the lateral (horizontal) canal, resulting in horizontal nystagmus, the Lempert maneuver has been used for productive results. It is unusual for the lateral canal to respond to the canalith repositioning procedure used for the posterior canal BPPV. Treatment is therefore geared toward moving the canalith from the lateral canal into the vestibule. The roll maneuver or its variations are used, and involve rolling the person 360 degrees in a series of steps to reposition the particles. This maneuver is generally performed by a trained clinician who begins seated at the head of the examination table with the person supine There are four stages, each a minute apart, and at the third position the horizontal canal is oriented in a vertical position with the person's neck flexed and on forearm and elbows. When all four stages are completed, the head roll test is repeated, and if negative, treatment ceases. Deep head hanging maneuver For the superior ( also called anterior ) semicircular canal, resulting in vertical nystagmus, the Deep head hanging maneuver is used. The patient lays down on their back on a bed with their head overhanging the bed. In the first step the head is turned as backward (hanging) as possible. In the following step, the patient remains lying but lifts their head with the chin close to the chest. In the last step, the patient sits upright with