PMC5733753_01
vHIT three days after symptoms begun on first episode.
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fig1
A vHIT showed decreased gains when the superior and horizontal semicircular canal receptors were tested on the right side (0.34 and 0.58, resp.) with several refixation saccades (Figure 1).
vHIT 14 days after first episode.
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fig2
A third vHIT performed 14 days later (when clinical recovery was almost complete) showed gain recovery in the right side of 0.83 in the superior semicircular canal and 0.88 in the horizontal canal (with clear covert refixation saccades), and a nonsignificant gain decrease in the posterior canal was detected (Figure 2).
vHIT three days after the beginning of the second episode.
CRIOT2017-3628402.003.jpg
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fig3
The clinical examination was similar, and another vHIT showed a new decrease in superior and lateral semicircular canal gains (Figure 3) similar to that found in the first episode.
vIT 14 days after the beginning of the second episode shows complete recovery of gains.
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fig4
A new vHIT performed two weeks after the initiation of symptoms (Figure 4) showed a new recovery of the gains.