Jaw reflexes and masseter electromyograms in mesencephalic and pontine lesions: an electrodiagnostic study

Jaw reflexes and masseter electromyograms were studied in five patients with mesencephalic and 11 patients with pontine lesions, vascular or tumorous in nature. In the former group jaw reflexes were abnormal, being delayed or absent, whereas masseter electromyograms were normal. In the latter group,...

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Bibliographic Details
Published inJournal of neurology, neurosurgery and psychiatry Vol. 39; no. 1; pp. 90 - 92
Main Authors Ongerboer De Visser, B W, Goor, C
Format Journal Article
LanguageEnglish
Published England BMJ Publishing Group Ltd 01.01.1976
BMJ Publishing Group LTD
Subjects
Brain Diseases - physiopathology
Brain Neoplasms - diagnosis
Electromyography
Evoked Potentials
Masticatory Muscles - physiopathology
Mesencephalon - physiopathology
Pons - physiopathology
Reaction Time
Reflex, Abnormal
Trigeminal Nerve
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Summary:Jaw reflexes and masseter electromyograms were studied in five patients with mesencephalic and 11 patients with pontine lesions, vascular or tumorous in nature. In the former group jaw reflexes were abnormal, being delayed or absent, whereas masseter electromyograms were normal. In the latter group, both jaw reflexes and masseter EMG, showing denervation, were abnormal in six and both normal in five cases. It is suggested that the afferent limb of the human jaw reflex passes through the mesencephalic trigeminal nucleus. The methods proved to be valuable in the diagnosis of mesencephalic and pontine lesions involving the fifth cranial nerve.
Bibliography:href:jnnp-39-90.pdf
PMID:1255217
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content type line 23
ISSN:0022-3050
1468-330X
DOI:10.1136/jnnp.39.1.90