Effects of laser radiation on the function of the internal ear receptors were studied using short-latent acoustic evoked potentials (SLAEP) of rabbit truncus cerebri. Contact laser impact in the area of the medial wall of the tympanic cavity in one of the ear was made after registration of baseline SLAEP. The other ear served control. It was found that YAG-Nd laser radiation had the receptor damage threshold within 7-8 W. Assessment of laser energy reaching receptors of the animals' labyrinth was carried out by the thickness of the bone of tympanic medial wall in the rabbit middle ear. Differences in the above thickness in humans and rabbits and calculated transmission factors for laser radiation of the bone tissues indicate that radiation power 14-16 W may appear critical in manipulations on human middle ear.
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