Introduction about CP Angle surgery and History. What are the Preoperative Point/ Preparations. CP Angle Surgery. House-Brackmann facial nerve grading system I-VI. CP Angle Surgery. Grade I – Normal– Grade II – Slight Dysfunction– Grade III – Moderate Dysfunction Grade IV – Moderate Severe Dysfunction– Grade V – Severe Dysfunction– Grade VI – Total Paralysis– … Continue reading Why Neurophysiological Monitoring in CP Angle surgery?.