Educational Lecture : Clinical tests of vestibular and balance function ; its origin, present status and future development
subjective visual vertical: SVV
2020 Volume 79 Issue 4 Pages 211-217
Details
2020 Volume 79 Issue 4 Pages 211-217
Measurement of the subjective visual vertical (SVV) is clinically used as a method to assess the degree of dysfunction of the otolith, vertical semicircular canals, vestibular nerves, and central graviceptive pathways.
In this short review, the author describes the history, basic neurophysiological findings, including the relation between the ocular tilt and bias of SVV, and interpretation of the examination data and clinical data.
The tilt of SVV is a parameter of tonic afferent differences between the two labyrinths, similar to vestibular nystagmus, but SVV provides additional information, different from that obtained by nystagmus testing, on the labyrinth function.
In clinical practice, however, measurement of SVV is not so widely used as a clinical test. It is expected that SVV testing will be conducted in more institutions in clinical practice as a complementary test to nystagmus testing.
