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The inner ear and brain stem functions as a severity index for head trauma
Published September 11, 1991 by International Research Council on Biokinetics of Impact in Switzerland
Impact biomechanics research on the head has frequently looked at fatal cerebral lesions. In the head trauma population, there are patients with no brain injury, but presenting labyrinthic commotions. The important factor here is less the probability that an inner ear lesion occurs, than the bringing in of this kind of lesion to the head tolerance limits research.
Initially we briefly review the clinical observations, i.e. vertigo, deafness, etc. We then examine the mathematical models which describe the semicircular canal, cupula and macula.
Finally the results are related to the theoretical values of mechanical parameters applied to the different inner ear organs in cases of extreme linear and angular acceleration as found in the literature.