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Active versus passive head-shaking nystagmus.
Acta Otolaryngol. 2007 Jul; 127(7):722-8.AO

Abstract

CONCLUSIONS

We recommend performing the test for nystagmus actively, both when the response is analyzed at bedside or with videonystagmography. If no nystagmus is observed with the active test, it should then be performed passively.

OBJECTIVE

Head-shaking nystagmus (HSN) is a sign of vestibular dysfunction that is elicited after actively (patient) or passively (examiner) shaking a patient's head. The objective of this study was to analyze the frequency of HSN when the test is performed actively (aHSN) or passively (pHSN), and to determine whether any differences in the results might be due to age or disease state, or whether they reflect the results of different vestibular tests.

PATIENTS AND METHODS

This was a prospective study conducted at a tertiary care center. The head-shaking test was carried out actively and passively on 100 patients. The caloric test, the rotatory chair tests and the measures of disability were performed on the same day and in the same setting. HSN was considered to be present when it was seen for a period longer than 5 s or if the maximum slow-phase velocity of HSN was higher than 3 degrees s(-1). Four groups were established according to the results of the two testing methods.

RESULTS

The frequency of aHSN was 47% and of pHSN was 46% when the presence of nystagmus was established as the criterion. Moreover, in patients who had experienced vestibular neuritis previously, the type of nystagmus was age-dependent. When the velocity of the nystagmus elicited was considered, the results coincided with the method of testing in 74% of the patients, while they differed in 26% of subjects; the aforementioned age dependency was no longer seen. Differences in the caloric and rotatory chair test results, as well as in disability, were observed in the groups generated on the basis of the types of nystagmus.

Authors+Show Affiliations

Department of Otorhinolaryngology, Clínica Universitaria de Navarra, University Hospital and Medical School, University of Navarra, Pamplona, Spain.No affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

17573568

Citation

Gimeno-Vilar, Carlos, et al. "Active Versus Passive Head-shaking Nystagmus." Acta Oto-laryngologica, vol. 127, no. 7, 2007, pp. 722-8.
Gimeno-Vilar C, Rey-Martinez J, Perez N. Active versus passive head-shaking nystagmus. Acta Otolaryngol. 2007;127(7):722-8.
Gimeno-Vilar, C., Rey-Martinez, J., & Perez, N. (2007). Active versus passive head-shaking nystagmus. Acta Oto-laryngologica, 127(7), 722-8.
Gimeno-Vilar C, Rey-Martinez J, Perez N. Active Versus Passive Head-shaking Nystagmus. Acta Otolaryngol. 2007;127(7):722-8. PubMed PMID: 17573568.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Active versus passive head-shaking nystagmus. AU - Gimeno-Vilar,Carlos, AU - Rey-Martinez,Jorge, AU - Perez,Nicolas, PY - 2007/6/19/pubmed PY - 2007/9/28/medline PY - 2007/6/19/entrez SP - 722 EP - 8 JF - Acta oto-laryngologica JO - Acta Otolaryngol VL - 127 IS - 7 N2 - CONCLUSIONS: We recommend performing the test for nystagmus actively, both when the response is analyzed at bedside or with videonystagmography. If no nystagmus is observed with the active test, it should then be performed passively. OBJECTIVE: Head-shaking nystagmus (HSN) is a sign of vestibular dysfunction that is elicited after actively (patient) or passively (examiner) shaking a patient's head. The objective of this study was to analyze the frequency of HSN when the test is performed actively (aHSN) or passively (pHSN), and to determine whether any differences in the results might be due to age or disease state, or whether they reflect the results of different vestibular tests. PATIENTS AND METHODS: This was a prospective study conducted at a tertiary care center. The head-shaking test was carried out actively and passively on 100 patients. The caloric test, the rotatory chair tests and the measures of disability were performed on the same day and in the same setting. HSN was considered to be present when it was seen for a period longer than 5 s or if the maximum slow-phase velocity of HSN was higher than 3 degrees s(-1). Four groups were established according to the results of the two testing methods. RESULTS: The frequency of aHSN was 47% and of pHSN was 46% when the presence of nystagmus was established as the criterion. Moreover, in patients who had experienced vestibular neuritis previously, the type of nystagmus was age-dependent. When the velocity of the nystagmus elicited was considered, the results coincided with the method of testing in 74% of the patients, while they differed in 26% of subjects; the aforementioned age dependency was no longer seen. Differences in the caloric and rotatory chair test results, as well as in disability, were observed in the groups generated on the basis of the types of nystagmus. SN - 0001-6489 UR - https://www.unboundmedicine.com/medline/citation/17573568/Active_versus_passive_head_shaking_nystagmus_ L2 - https://www.tandfonline.com/doi/full/10.1080/00016480600987800 DB - PRIME DP - Unbound Medicine ER -