**Author details**

Madalina Gabriela Georgescu

Address all correspondence to: madalina.georgescu@gecad.com

"Carol Davila" University of Medicine and Pharmacy, Bucharest, Romania

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116 Up to Date on Meniere's Disease

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#### **Testing of the Semicircular Canal Function in Vertigo and Dizziness Testing of the Semicircular Canal Function in Vertigo and Dizziness**

Holger A. Rambold Holger A. Rambold

Additional information is available at the end of the chapter Additional information is available at the end of the chapter

http://dx.doi.org/10.5772/66688

#### **Abstract**

Testing the function of the semicircular canals (SCC) in vertigo and dizziness is an important step towards a diagnosis. There are different vestibular tests available: rotatory testing, bithermal caloric irrigation (CI) and the video-head-impulse test (vHIT). This chapter describes the basic methods, the current knowledge and economic aspects focused on the vHIT and CI. After a general section, common vertigo diseases are discussed with respect to the functional tests. From this chapter, it is clear that not only one method has to be applied to test vestibular function but a battery including the CI and the vHIT in three dimensions.

**Keywords:** video-head-impulse test, bithermal caloric irrigation, vestibular tests, vertigo, dizziness, vestibular disease

## **1. Introduction**

One major step in diagnosing dizziness and vestibular disease, in addition to a detailed clinical history and neurologic, neuro-ophthalmologic and neuro-otologic examination, is to test the sensors of the labyrinth quantitatively. There are two sets of sensors: the linear/gravity sensors (otoliths, sacculus and utriculus) and the rotational sensors (semicircular canals; SSCs). Both sensor types are important to keep balance and help to orient oneself in space. To test the sensors, different specific tests are available and it is often unclear what methods should be used. This chapter summarizes current knowledge of the testing opportunities and techniques in respect to vestibular function of the SCCs and to different disease. First the different techniques, second the lesion patterns in different vertigo/dizziness disease and third economic aspects are described.

© 2017 The Author(s). Licensee InTech. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. © 2017 The Author(s). Licensee InTech. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
