Vestibular evoked myogenic potentials in response to laterally directed skull taps

In recent years it has been demonstrated that loud clicks generate short latency vestibular evoked myogenic potentials (VEMP). It has also been demonstrated that midline forehead skull tap stimulation evokes similar VEMP. In the present study, the influence of skull tap direction on VEMP was studied...

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Bibliographic Details
Published inJournal of vestibular research Vol. 12; no. 1; pp. 35 - 45
Main Authors Brantberg, Krister, Tribukait, Arne
Format Journal Article
LanguageEnglish
Published London, England SAGE Publications 01.01.2002
Subjects
Acoustic Stimulation
Adult
Electromyography
Evoked Potentials - physiology
Female
Forehead - physiology
Functional Laterality - physiology
Humans
Male
Medicin och hälsovetenskap
Middle Aged
Muscle, Skeletal - physiology
Physical Stimulation
Reference Values
Reproducibility of Results
sacculus
Skull - physiology
skull taps
Space life sciences
utriculus
VEMP
Vestibular Diseases - physiopathology
Vestibule, Labyrinth - injuries
Vestibule, Labyrinth - physiology
vestibulocollic
VEMP
skull taps
vestibulocollic
sacculus
utriculus
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Summary:In recent years it has been demonstrated that loud clicks generate short latency vestibular evoked myogenic potentials (VEMP). It has also been demonstrated that midline forehead skull tap stimulation evokes similar VEMP. In the present study, the influence of skull tap direction on VEMP was studied in 13 normal subjects and in five patients with unilateral vestibular loss. Gentle skull taps were delivered manually above each ear on the side of the skull. The muscular responses were recorded over both sternocleidomastoid muscles using skin electrodes. Among the normals, laterally directed skull taps evoked “coordinated contraction-relaxation responses”, i.e. skull taps on one side evoked a negative-positive “inverted” VEMP on that side and a positive-negative "normal" VEMP on the other side. Among patients with unilateral vestibular function loss, skull taps above the lesioned ear evoked similar coordinated contraction-relaxation responses. However, skull taps above the healthy ear did not evoke that type of response. These findings suggest that laterally directed skull taps activate mainly the contralateral labyrinth.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
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ISSN:0957-4271
1878-6464
1878-6464
DOI:10.3233/VES-2002-12104