Key Issues Of The Vestibular Function Testing System

Vestibular function using electronystagmography (ENG) is one of the important parts in neurophysiology of the vestibular system. In this dissertation, we used ENG to examine the function of vestibular nerve system. The object of this dissertation is to research the key techniques of the vestibular function examine system, to develop the examine system of vestibular function and to verify the clinical feasibility of the system by means of electronystagmogram experiments. The research was based on the ENG theory of the potential difference between cornea and omentum during the motion of the eyeball.The main content of this dissertation includes:1. The characteristic of vertigo and its sorts, the structure and function of the vestibular nerve system, the evolution and applied foreground of the technology of ENG, and the basic theory of ENG were studied.2. The key techniques of the vestibular-function examining system were researched and we designed a vestibular function examining system. The key techniques of the system were the development of the ENG stimulator and the data sampling & controlling interface card, and the design of the system software. We designed one distributed controlling system, the main controlling system consisted of the data sampling & controlling interface card and the slave controlling system consisted of the ENG stimulator self-carried 8031 single chip system. The data sampling & controll-ing interface card had both data sampling and controlling function, and the 8031 single chip accomplished the stimulate mode concretely. The system realized the drive and control of the data sampling & controlling interface card utilizing VxD, which improved the data sampling precision.3. Considering the needs of laypeople and the maneuverability adequately, we designed powerful and easy operation software, which can complete data's receiving, calculating, displaying, analyzing, saving and printing, and other assistant functions.4. Good results from the ENG experiments were given in this dissertation. It verified the maneuverability of the system and proved that the system could be applied in clinical examine of vestibular function.