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Related Experiment Videos

Trismus resulting from central nervous system lesion.

V Freitag, A Schulz

    Journal of Maxillofacial Surgery
    |December 1, 1976
    PubMed
    Summary

    Unusual trismus, or jaw stiffness, can indicate brain stem lesions in patients with central nervous system damage. This symptom arises from disrupted coordination of the masticatory muscles.

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    Area of Science:

    • Neurology
    • Neuroscience
    • Clinical Medicine

    Background:

    • Trismus, characterized by limited jaw opening, is often associated with dental or temporomandibular joint issues.
    • Central nervous system (CNS) lesions are not typically recognized as a primary cause of trismus.

    Observation:

    • This report details three cases of unusual trismus in patients diagnosed with CNS lesions.
    • Clinical and electromyographical evaluations were performed to assess the nature of the trismus.

    Findings:

    • The observed trismus was interpreted as a symptom directly resulting from a brain stem lesion.
    • Electromyography revealed a dis-synergism, or lack of coordinated function, among the masticatory muscles.

    Implications:

    • This suggests that trismus can serve as an indicator of brain stem pathology in specific patient populations.
    • Further research into CNS-related causes of trismus may improve diagnostic accuracy for neurological disorders.
    • Understanding this link can aid in the early identification and management of neurological conditions presenting with atypical symptoms.

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