An Interesting Unknown Combined Pathology in a Patient with Acute Balance Problem

Figure 2

Vestibular evoked myogenic potentials (cervical) following tone-burst sound stimuli of 95 dB nHL with rarefaction polarity, 5 Hz stimulus repetition rate, 1 ms rise/fall time, and 2 ms plateau time delivered at 500 Hz. Normal waveforms were seen on both sides. But, the P₁N₁ amplitude decreased on the right side (red drawing, recording from RE; blue drawing, recording from LE). Comparative analysis of the amplitude of the right and left side was less than 20%.