EMG potentials elicited by forehead taps in the sternocleidomastoid muscles and lower leg muscles--a study on patients with vestibular lesions

The aim of the present study was to determine whether a tap on the forehead evokes a vestibulospinal reflex in the sternocleidomastoid muscles and the lower leg muscles in patients with vestibular lesions. Although first positive-negative short-latency EMG potentials with a mean positive potential p...

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Bibliographic Details
Published inTokai journal of experimental and clinical medicine Vol. 23; no. 5; p. 225
Main Authors Iida, M, Aihara, H, Takahashi, H, Hitouji, K, Nomura, K
Format Journal Article
LanguageEnglish
Published Japan 01.11.1998
Subjects
Adult
Electromyography
Forehead - physiopathology
Humans
Leg
Muscle, Skeletal - physiopathology
Neck Muscles - physiopathology
Neurofibromatosis 1 - physiopathology
Vestibular Diseases - physiopathology
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Summary:The aim of the present study was to determine whether a tap on the forehead evokes a vestibulospinal reflex in the sternocleidomastoid muscles and the lower leg muscles in patients with vestibular lesions. Although first positive-negative short-latency EMG potentials with a mean positive potential peak of about 12.6 ms and a mean negative potential peak of about 17.3 ms were found in the bilateral sternocleidomastoid muscles in normal subjects, they were lacking in patients with vestibular lesions. The first negative short-latency EMG potentials had a mean latency of 48.3 +/- 3.1 ms (onset) to 98.3 +/- 6.3 ms (end) in both gastrocnemius muscles in normal subjects, but they were delayed in patients with vestibular lesions.
ISSN:0385-0005