J. Javier Mata⁽¹⁾, Jaime Marco ⁽²⁾, Juan M. Jiménez ⁽³⁾, Amparo Postigo⁽⁴⁾, Francisco Delgado Moreno^(5)
(1)Department of Neuro-otology. Centro Audiológico, S.L. - Sevilla. Spain
⁽²⁾Department of Otolaryngology. University Hospital - Valencia. Spain
⁽³⁾Department of Otolaryngology. "V. Valme" University Hospital - Sevilla. Spain
⁽⁴⁾Department of Audiology. Centro Audiologico, S.L - Sevilla. Spain
⁽⁵⁾Department of Otolaryngology. "V.del Rocio" University Hospital - Sevilla. Spain

	[Physiology]	[Otorhinolaryngology]

MATERIAL AND METHODS

We have worked with 36 adults, aged between 18 and 43 (average 32,3), not showing either otologic pathologies or alterations in the vestibular study carried out. This study is reported below.

AMPLAID MK15 multisensorial equipment has been used to register the bioelectrical responses. A previous electro-oculographic study had been carried out with its vestibular exploratory software. We registered the spontaneous oculomotor activity, conducted a saccadic, pendular and horizontal optokinetic monitoring, followed a classical positional manoeuvres and performed electronystagmographies after caloric stimulation with horizontal (binocular derivation) and vertical (monocular derivation) registers. As a stimulus we used 47ºC air coming from a Life-Tech caloric stimulator.

In order to register the bioelectrical activity, the aim of our study, we placed silver-silver chloride electrodes over the skin. The ipsilateral mastoid being the reference, the forehead the active one and the contralateral mastoid being considered as indifferent. The above-mentioned register was made coincide with that of the nystagmic response at maximum response stage -between 60 and 90 seconds- with closed eyes (table 1). To make the absence of auditory stimuli sure, the patient was provided with approved muffling headphones during this stage. The test was carried out in a specially soundproofed room, where the noise level didn’t go over 25 dB A.

Discussion Board

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[ABSTRACT] [INTRODUCTION] [MATERIAL AND METHODS] [RESULTS] [IMAGES AND TABLES] [DISCUSSION] [REFERENCES] [Discussion Board]

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	[Physiology]	[Otorhinolaryngology]

J. Javier Mata, Jaime Marco , Juan M. Jiménez , Amparo Postigo, Francisco Delgado Moreno
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Last update: 7/01/00