Abnormal vestibular function Non-spinning vertigo 2021-05-02T15:11:06Z A perception of unsteadiness of dizziness that is not characterized bythe spinning sensation of classic vertigo, but rather by an oscillatory perception (rocking, bobbing, or swaying despite the fact that the subject is not moving). This feature can be observed in mal de debarquement syndrome and in vestibular paroxysmia.