Alzuphar Stephen Jacques, Maire Raphaël
Unité d'otoneurologie et audiologie, Service d'oto-rhino-laryngologie et de chirurgie cervico-faciale , CHUV, 1011 Lausanne.
Rev Med Suisse. 2016 Oct 5;12(533):1665-1669.
Anterior semicircular canal Benign Paroxysmal Positional Vertigo (antBPPV) is the rarest form of semicircular canalolithiasis, corresponding to about 1-2 % of the BPPV. The diagnosis is obtained by either the Dix-Hallpike maneuver or the straight head hanging positioning maneuver, which provoke a characteristic positional down-beating nystagmus. This vertical nystagmus can be associated with a torsional component that helps in localizing the affected side. The differential diagnosis of antBPPV includes the various central lesions that produce vertical down beating nystagmus (posterior fossa). Several liberatory maneuvers have been proposed for the treatment of antBPPV, but still need standardization.
前半规管良性阵发性位置性眩晕（前半规管耳石症）是半规管耳石症最罕见的形式，约占良性阵发性位置性眩晕的1%-2%。通过Dix-Hallpike手法或直头悬挂定位手法进行诊断，这两种手法会诱发特征性的位置性下跳性眼震。这种垂直性眼震可能伴有扭转成分，有助于确定患侧。前半规管耳石症的鉴别诊断包括各种产生垂直下跳性眼震的中枢性病变（后颅窝）。已经提出了几种复位手法来治疗前半规管耳石症，但仍需要标准化。
