A manual of otology for students and practitioners . rotation. Thisproduces a nystagmus which follows the rules to be men-tioned, and has been seen by an observer occupying aplatform which rotated with the patient, thus allowing aview of the eyes to be obtained during the rotation. But 304 SUPPURATIVE DISEASES OF LABYRINTH this method is impracticable, therefore not used. Afterthe patient has been rotated ten times, the endolymph haspicked up the motion of the horizontal canals and ismoving at the same rate and in the same direction as thecanals and there is therefore no current. The rotationi
A manual of otology for students and practitioners . rotation. Thisproduces a nystagmus which follows the rules to be men-tioned, and has been seen by an observer occupying aplatform which rotated with the patient, thus allowing aview of the eyes to be obtained during the rotation. But 304 SUPPURATIVE DISEASES OF LABYRINTH this method is impracticable, therefore not used. Afterthe patient has been rotated ten times, the endolymph haspicked up the motion of the horizontal canals and ismoving at the same rate and in the same direction as thecanals and there is therefore no current. The rotationis now suddenly stopped and the canal becomes at rest,but the endolymph on account of its inertia continues inmotion. This produces a current in the direction of rota-tion. As the ampulla of the horizontal canals lies anteriorlyit follows that the current will be toward the ampullain one and away from the ampulla in the other (Fig. 99).While the current in the two canals, the one plus and theother minus, have the same effect upon the eyes, since the.
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