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Full text of "Diseases Of The Nose Throat And Ear"

PHYSIOLOGY OF THE VESTIBULAR APPARATUS

271

at constant velocity, the cupola on the crista will return to rest and there will
be no sensation of rotation and no nystagmus. If the rotation is suddenly

Fig. 150. Rotation chair.
Posterior

Left
Horizontal

AmpullaJ 11    to***

Flow of

Endolymph

pulls eyes to left

Beginning of Rotation to Right
Posterior



Right

Horizontal

Canal

Ampulla  ****    Ampulla

B

Horizontal
Canal

Endolymph        ^     Anterior       ~^      X
pulls eyes to right                                      Nystagrtws

 ^__________         to /eft

^                           results

End of Rotation to W>*

Fig. 151. Diagram of flow of endolymph in horizontal semicircular canals in rotatii
standing above and in front of the patient, is asked to visualize what is taking plat
beginning and also at the end of the test. The patient is looking towards the bottc

rizontal semicircular canals in rotation test. The observer,
asked to visualize what is taking place in the canals at the
: patient is looking towards the bottom of the page.