title: Refixation Saccades with Normal Gain Values: A Diagnostic Problem in the Video Head Impulse Test: A Case Report.
abstract: 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.
authors.affiliation: Department of ENT Head and Neck Surgery, Odense University Hospital , Denmark.
authors.forename: Leise Elisabeth Hviid
authors.initials: LE
authors.lastname: Korsager
authors.affiliation: Department of ENT Head and Neck Surgery, Odense University Hospital , Denmark.
authors.forename: Christian Emil
authors.initials: CE
authors.lastname: Faber
authors.affiliation: Department of Audiology, Odense University Hospital , Denmark.
authors.forename: Jesper Hvass
authors.initials: JH
authors.lastname: Schmidt
authors.affiliation: Department of ENT Head and Neck Surgery, Odense University Hospital , Denmark.
authors.forename: Jens Højberg
authors.initials: JH
authors.lastname: Wanscher
keywords: cochlear implant; refixation saccades; vestibular function; vestibulo-ocular reflex; video head impulse test