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Capsular genu syndrome.

J Bogousslavsky1, F Regli

  • 1Department of Neurology, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland.

Neurology
|October 1, 1990
PubMed
Summary
This summary is machine-generated.

Strokes affecting the genu of the internal capsule often cause facial and tongue weakness with speech difficulties. This pattern strongly suggests a capsular genu stroke.

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Area of Science:

  • Neurology
  • Neuroscience
  • Stroke Medicine

Background:

  • The internal capsule is a critical white matter structure in the brain.
  • Lesions in the internal capsule can lead to significant motor deficits.
  • The specific functional localization within the genu of the internal capsule requires further elucidation.

Observation:

  • This study analyzed six patients with lesions confined to the genu of the internal capsule.
  • Five patients experienced infarcts, and one had a hemorrhage in this specific brain region.

Findings:

  • The most common symptom observed was contralateral facial and lingual hemiparesis (weakness) accompanied by dysarthria (speech difficulty).
  • Additional findings included unilateral weakness in mastication, palate, and pharynx in three patients, and vocal cord paresis in one.

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  • Mild hand weakness was noted in four patients, indicating limited limb involvement.

    • Implications:

    • The results suggest that the genu of the internal capsule predominantly houses motor corticopontine and corticobulbar fibers.
    • The observed faciolingual syndrome and its variations are highly indicative of a stroke affecting the genu of the internal capsule.
    • This enhances the diagnostic specificity for lesions in this precise brain area.