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Released involuntary laughter after temporal lobe infarction.

M Swash

    Journal of Neurology, Neurosurgery, and Psychiatry
    |February 1, 1972
    PubMed
    Summary

    A patient experienced sustained involuntary laughter and mood changes due to a left temporal lobe infarction. This case highlights the neurology of emotional behavior and lesion localization.

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    Area of Science:

    • Neurology
    • Neuroscience
    • Psychiatry

    Background:

    • Involuntary emotional expression, such as pathological laughter, can be a symptom of neurological disorders.
    • Understanding the neural correlates of emotional behavior is crucial for diagnosing and treating such conditions.

    Purpose of the Study:

    • To describe a case of sustained involuntary laughter and mood alteration.
    • To correlate the clinical presentation with specific brain lesion localization.
    • To discuss the neurology of emotional behavior in light of the case findings.

    Main Methods:

    • Clinical case presentation.
    • Diagnostic imaging including electroencephalography (EEG), radioisotope brain scan, and angiography.
    • Neurological examination and assessment of emotional behavior.

    Main Results:

    • Infarction in the inferior and lateral aspects of the left temporal lobe was identified as the cause.
    • Clinical findings, EEG, brain scan, and angiography confirmed the lesion's location.
    • The patient exhibited sustained involuntary laughter with associated mood changes.

    Conclusions:

    • Left temporal lobe lesions can cause involuntary emotional responses like laughter.
    • This case contributes to understanding the neurological basis of emotional behavior.
    • Precise lesion localization is key to explaining complex neurological symptoms.

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