Figure 2. Clinical utility of VEMP test in vestibular schwannoma patients.

This patient has a right VS in the cerebello-pontine angle. Despite the size of the VS (MRI in A), he had both normal hearing and caloric test results. Patient had superior nerve dysfunction (absence of AC STB cVEMP on the right SCM when the right ear was stimulated: B) and inferior nerve dysfunction (abnormal AC STB oVEMPs on the left eye when the right ear was stimulated: C). When the left intact ear was stimulated, normal AC STB cVEMPs (D) and normal AC STB oVEMPs (E) were observed.