A system for detecting and recording head orientations of a person includes: a first sensor device capable of providing sensor data regarding a head orientation of a person in a three-dimensional space； a medical data acquisition system configured for storing and outputting the sensor data from the first sensor device； and a processor configured for processing the sensor data from the medical data acquisition system, outputting a first signal representing the head orientation, and generating an image for presentation by a graphical display； wherein the image comprises: a first reference indicator； an orientation indicator, wherein a position of the orientation indicator in the image is determined based on the first signal from the processor, and a feedback indicator when a first condition is met. The sytem is used in process for diagnosing and treating vertigo, dizziness and similar balance-related disorders in a human being.This allows a physician, while carrying out a Dix-Hallpike manoeuvre, an Epley manoeuvre or a Semant manoeuvre, to follow manipulations of the orientation of the person in a precise and secure way without involving the use of bulky equipment or elaborate training.
