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Analysis of the vestibulo-ocular reflex time constant in patients with benign recurrent vertigo associated with head-shaking nystagmus.
Acta Otolaryngol. 2006 Apr; 126(4):358-63.AO

Abstract

CONCLUSIONS

When considering benign recurrent vertigo and a similar peripheral vestibular deficiency, the asymmetry of the vestibulo-ocular reflex (VOR) time constant (Tc) is lower in those patients with paretic head-shaking nystagmus (HSN) than in those with reversed HSN or without HSN.

OBJECTIVE

To determine whether the existence of HSN is related to the time constant of the VOR in patients with benign recurrent vertigo (BRV).

PATIENTS AND METHODS

This was a prospective study conducted at a tertiary care center in which patients were subjected to the head-shaking test, the caloric test and rotatory chair impulsive test on the same day. The clinical features of the disease analyzed were the disease duration, frequency of vertigo spells, time since the last vertigo spell and the existence of migraine. The results of the head-shaking test were considered positive when nystagmus appeared after head-shaking had ended. Two groups of patients were established on the basis of these results and the group that displayed HSN was divided according to the direction of nystagmus. In the impulsive test, the time constant of the VOR after ipsilesional and contralesional acceleration was analyzed, as was the symmetry of the response. The differences in the means were calculated.

RESULTS

BRV was diagnosed in 25% of patients suffering recurrent spells of vertigo, of which 33 patients were HSN- and 29 were HSN+. In the latter group, vestibular migraine was frequently observed (83% of the patients), the spells of vertigo were more frequent and the patients were seen closer to the previous spell of vertigo. No differences were observed in the Tc of the VOR between HSN+ and HSN- patients, although the asymmetry of this Tc was higher in HSN- patients than in HSN+ patients. Nevertheless, the differences observed were only significant between paretic and reversed HSN patients and paretic HSN patients and HSN- patients.

Authors+Show Affiliations

Department of Otorhinolaryngology, Clínica Universitaria de Navarra, University of Navarra, Pamplona, Spain. nperezfer@unav.esNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

16608786

Citation

Pérez-Fernandez, Nicolás, et al. "Analysis of the Vestibulo-ocular Reflex Time Constant in Patients With Benign Recurrent Vertigo Associated With Head-shaking Nystagmus." Acta Oto-laryngologica, vol. 126, no. 4, 2006, pp. 358-63.
Pérez-Fernandez N, Der-Musa C, Boleas-Aguirre MS, et al. Analysis of the vestibulo-ocular reflex time constant in patients with benign recurrent vertigo associated with head-shaking nystagmus. Acta Otolaryngol. 2006;126(4):358-63.
Pérez-Fernandez, N., Der-Musa, C., Boleas-Aguirre, M. S., & Martinez-Vila, E. (2006). Analysis of the vestibulo-ocular reflex time constant in patients with benign recurrent vertigo associated with head-shaking nystagmus. Acta Oto-laryngologica, 126(4), 358-63.
Pérez-Fernandez N, et al. Analysis of the Vestibulo-ocular Reflex Time Constant in Patients With Benign Recurrent Vertigo Associated With Head-shaking Nystagmus. Acta Otolaryngol. 2006;126(4):358-63. PubMed PMID: 16608786.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Analysis of the vestibulo-ocular reflex time constant in patients with benign recurrent vertigo associated with head-shaking nystagmus. AU - Pérez-Fernandez,Nicolás, AU - Der-Musa,Carolina, AU - Boleas-Aguirre,Maria S, AU - Martinez-Vila,Eduardo, PY - 2006/4/13/pubmed PY - 2006/12/9/medline PY - 2006/4/13/entrez SP - 358 EP - 63 JF - Acta oto-laryngologica JO - Acta Otolaryngol VL - 126 IS - 4 N2 - CONCLUSIONS: When considering benign recurrent vertigo and a similar peripheral vestibular deficiency, the asymmetry of the vestibulo-ocular reflex (VOR) time constant (Tc) is lower in those patients with paretic head-shaking nystagmus (HSN) than in those with reversed HSN or without HSN. OBJECTIVE: To determine whether the existence of HSN is related to the time constant of the VOR in patients with benign recurrent vertigo (BRV). PATIENTS AND METHODS: This was a prospective study conducted at a tertiary care center in which patients were subjected to the head-shaking test, the caloric test and rotatory chair impulsive test on the same day. The clinical features of the disease analyzed were the disease duration, frequency of vertigo spells, time since the last vertigo spell and the existence of migraine. The results of the head-shaking test were considered positive when nystagmus appeared after head-shaking had ended. Two groups of patients were established on the basis of these results and the group that displayed HSN was divided according to the direction of nystagmus. In the impulsive test, the time constant of the VOR after ipsilesional and contralesional acceleration was analyzed, as was the symmetry of the response. The differences in the means were calculated. RESULTS: BRV was diagnosed in 25% of patients suffering recurrent spells of vertigo, of which 33 patients were HSN- and 29 were HSN+. In the latter group, vestibular migraine was frequently observed (83% of the patients), the spells of vertigo were more frequent and the patients were seen closer to the previous spell of vertigo. No differences were observed in the Tc of the VOR between HSN+ and HSN- patients, although the asymmetry of this Tc was higher in HSN- patients than in HSN+ patients. Nevertheless, the differences observed were only significant between paretic and reversed HSN patients and paretic HSN patients and HSN- patients. SN - 0001-6489 UR - https://www.unboundmedicine.com/medline/citation/16608786/Analysis_of_the_vestibulo_ocular_reflex_time_constant_in_patients_with_benign_recurrent_vertigo_associated_with_head_shaking_nystagmus_ L2 - https://www.tandfonline.com/doi/full/10.1080/00016480500415605 DB - PRIME DP - Unbound Medicine ER -