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Tilt suppression, OKAN, and head-shaking nystagmus at long-term follow-up after unilateral vestibular neurectomy
Karolinska Hospital.
1996 (engelsk)Inngår i: Journal of Vestibular Research-Equilibrium & Orientation, ISSN 0957-4271, E-ISSN 1878-6464, Vol. 6, nr 4, s. 235-241Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The functional status of the velocity storage mechanism was studied in patients at long-term follow-up (2 to 4 years) after unilateral vestibular neurectomy. The time constant of the vestibulo-ocular reflex (VORtc), the effect of head tilt on postrotatory nystagmus, optokinetic after-nystagmus (OKAN), and nystagmus after rapid head shaking were studied in 10 patients. In agreement with previous findings, VORtc was found to be short and most patients manifested OKAN, suggesting that unilateral peripheral vestibular loss is associated with a complete loss of storage within the the VOR but only a partial loss of velocity storage for visual input. However, at postrotatory head tilt the VOR time constant was further shortened, supposedly due to discharge of functioning velocity storage. Moreover, most patients manifested nystagmus after head shaking. These findings on tilt suppression and head-shaking nystagmus suggest that velocity storage within the VOR may function even in patients with complete unilateral vestibular lesions.

sted, utgiver, år, opplag, sider
1996. Vol. 6, nr 4, s. 235-241
Emneord [en]
velocity storage, tilt suppression, OKAN, head-shaking nystagmus, vestibular neurectomy
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-45655ISI: A1996UZ06200002PubMedID: 8839820OAI: oai:DiVA.org:kth-45655DiVA, id: diva2:452911
Merknad
QC 20111102Tilgjengelig fra: 2011-10-31 Laget: 2011-10-31 Sist oppdatert: 2018-01-12bibliografisk kontrollert

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