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(A) Initial otoliths position setting in the horizontal semicircular canal; (B) location distribution of otoliths after stable settlement. (a) The side of the short arm (the ampulla near the utricle); (b) the ampulla of the long arm; (c) the anterior arm of the long arm; (d) the posterior arm of the long arm; (e) the posterior arm is close to the opening of the utricle; (f) utricle opening of the posterior arm.
