ELECTRONYSTAGMOGRAPHY The electronystagmography is based on the fact that there exists around the eye an electric field. The modifications induced in this electric field by the eye movements are recorded by electrodes, filtered, amplified and analysed. IDEAS III is the essential tool to study the various functions of balance, namely the study of the oculomotricity (ocular saccades, pursuit, optocinetic nystagmus) and the study of the vestibular system (spontaneous and positional nystagmi, rotatory tests, caloric tests). IDEAS III is complementary with videonystagmography in case of the use of corrector optical is necessary. Moreover, the signal is not disturbed by the make-up on the eyelids or the nervous twitches. DISOFT SOFTWARE IDEAS III is accompanied by a powerful data-processing software which simplifies the task of the doctor. According to the performed tests, the software analyses and measures various parameters: number of jolts or ocular movements amplitude, frequency low phase velocity of the nystagmus latency, phase, distorsion gain symmetry or asymmetry of the response labyrinthine paresis or hypoexcitabilities, directional preponderance of nystagmus compare the answers opened eyes, closed eyes and measure the indices of ocular fixation Description IDEAS III 2-channels electronystagmograph, with software, without computer, without printer (Recupel included) Option IDEAS III 2-channels electronystagmograph for VNG NAC Network board to connect all Difra devices to the computer TECHNICAL SPECIFICATION Supply: DC 4,8V by rechargeable battery Number of channels: 2 or 4 equivalent to 1 or 2 in VNG Modes: AC and DC Input offset range: 100 mV Amplification gain: form 100 to 250000 Low pass filter: 10 to 100 Hz, Bessel 8th order High pass filter (AC mode): 1 sec. Sampling frequency: 200 Hz Accuracy: 0,05% (12 bits) Isolation: 3 kV DC Connection: NAC Weight: 500 grams Size: 230 x 95 x 55 mm (W x D x H) IDEAS III meets the actual IEC-601-1 standards Class I type B. Instrumentation DIFRA S.A Rue de l'Eglise 84 B-4840 WELKENRAEDT - BELGIUM - Tel. : +32 (0)87-898080 - Fax : +32 (0)87-898089 E-mail : [email protected] - Web : www.difra.be