J Korean Bal Soc.  2008 Dec;7(2):182-187.

Subjective Visual Vertical during Eccentric Rotation in Acute Vestibular Neuritis Patients

• Kwon KH
• Park MS
• Byun JY

Abstract

BACKGROUND AND OBJECTIVE: By assessing unilateral utricular function at the acute unilateral vestinuloneuritis (Acute UVN), we sought to determine the ability of the subjective visual vertical (SVV) during eccentric rotation (dynamic SVV) in localizing the site of the lesion in unilateral vestibular neuritis (UVN).
METHODS
The static SVV and dynamic SVV of fifteen patients diagnosed with acute UVN were enrolled within 10 days of onset (average 7 days). First, the static SVV was measured in a dark booth without rotation. The dynamic SVV was measured during rotation with an eccentric displacement of the head to 3.5 cm from the vertical rotation axis during a constant velocity of 300 degrees/s.
RESULTS
In the acute stage of UVN, the static SVV showed an increase in deviation to the side of the lesion compared to those of normal subjects. Also, we found 73% of abnormal findings in Acute UVN patients by assessing static conventional SVV. The dynamic SVV had a statistically significant increase in deviation to the side of the lesion compared to those of normal subjects and 93% patients showed beyond normal range.
CONCLUSIONS
The dynamic SVV would be an effective method in the diagnosis and localization of acute unilateral vestibularneuritis.

Keyword

Acute vestibular neuritis; Subjective visual vertical; Eccentric rotation

MeSH Terms

Axis, Cervical Vertebra
Displacement (Psychology)
Head
Humans
Vestibular Neuronitis