Many and varied are the feelings and sensations described as vertigo, but in general they fall into one or the other of two main patterns: the rotatory or turning vertigos and the tactile vertigos. As turning vertigo is nearly always a sign of disturbed vestibular function and tactile vertigo may also at times be of vestibular origin, it is fitting that they should peculiarly interest members of our specialty.
The vestibular mechanism has two distinctive functions or reactions. These reactions are vertigo and nystagmus, and whenever a vestibular mechanism is irritated these reactions can be obtained. The vestibular mechanism may also concern itself with other reactions, such as past pointing and disturbances in equilibrium, but it does not actually cause these reactions in the same way in which it causes nystagmus and vertigo, for they are the distinctive reactions of this mechanism.
Turning or rotatory vertigo is the most
GROVE WE. THE SYMPTOM OF VERTIGO. Arch Otolaryngol. 1931;14(2):177–180. doi:10.1001/archotol.1931.00630020201006
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