Refixation Saccades with Normal Gain Values: A Diagnostic Problem in the Video Head Impulse Test: A Case Report
| Autor: | Jesper Hvass Schmidt, Jens Højberg Wanscher, Leise Elisabeth Hviid Korsager, Christian Emil Faber |
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| Rok vydání: | 2017 |
| Předmět: |
medicine.medical_specialty
medicine.medical_treatment Vestibular disorders Case Report refixation saccades Audiology 03 medical and health sciences 0302 clinical medicine Cochlear implant medicine Video head impulse test Vestibular function 030223 otorhinolaryngology Cochlear implantation Refixation saccades Vestibular system Vestibulo-ocular reflex video head impulse test cochlear implant Head impulse test vestibular function Neurology vestibulo-ocular reflex Refixation Reflex sense organs Neurology (clinical) Vestibulo–ocular reflex Psychology 030217 neurology & neurosurgery Neuroscience |
| Zdroj: | Frontiers in Neurology Korsager, L E H, Faber, C E, Schmidt, J H & Wanscher, J H 2017, ' Refixation saccades with normal gain values : A diagnostic problem in the video head impulse test: A case report ', Frontiers in Neurology, vol. 8, no. MAR, 81 . https://doi.org/10.3389/fneur.2017.00081 |
| ISSN: | 1664-2295 |
| DOI: | 10.3389/fneur.2017.00081 |
| Popis: | Refixation saccades with normal gain value occur more frequently with increasing age. The phenomenon has also been observed in different vestibular disorders. In this case, we present a young male with normal gain value and refixation saccades tested with the video head impulse test (vHIT) the day after his cochlear implantation. One month after surgery, refixation saccades were no longer present. This suggests that refixation saccades can occur as a result of temporary pathology such as surgery. Refixation saccades with normal gain values might reflect a partial deficit in the vestibulo-ocular reflex. However, this partial deficit is in conflict with the current way of interpreting vHIT results in which the vestibular function is classified as either normal or pathological based only on the gain value. Refixation saccades, which are evident signs of vestibulopathy, are not considered in the evaluation. A new way of interpreting the vHIT based on the saccades must be considered. |
| Databáze: | OpenAIRE |
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