Fig. 7.

Hypothetical locations of arterial blockage calculated from the data of Taylor et al. [2016]. Taylor et al. [2016] examined all 5 vestibular end organs in 43 patients after acute VN. In the majority of cases, the patchy distribution of the lesions does not make it possible to explain the pathology by a single hypothetical vascular cause. Dashed yellow lines: involved nerves; yellow lines: intact nerves; red line: arteries; green lines: functional, intact sensory end organs (legend see also in Fig. 3). Twenty-two cases are shown from their data, in which both vestibular nerves were involved. Short black lines highlight where arterial obstruction could lead to the particular pattern of dysfunction in the individual groups. As these lines show, hypothetical acute blockage of blood supply would not be a simple explanation for the acute vestibular symptoms since in all cases shown at least 2 simultaneous locations should be assumed.