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Strokes restricted to the insular cortex.

C Cereda1, J Ghika, P Maeder

  • 1Department of Neurology, CHUV, Lausanne, Switzerland.

Neurology
|December 25, 2002
PubMed
Summary
This summary is machine-generated.

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Acute insular strokes can cause varied symptoms, including sensory, vestibular, and neuropsychological deficits. Posterior insula strokes may present with pseudothalamic sensory and vestibular syndromes, but not dysphagia.

Area of Science:

  • Neurology
  • Neuroscience
  • Stroke Medicine

Background:

  • The insula plays a crucial role in integrating sensory, emotional, and cognitive functions.
  • Acute stroke affecting the insula can lead to diverse clinical manifestations, often underdiagnosed or misattributed.

Purpose of the Study:

  • To clinically characterize acute strokes exclusively involving the insula.
  • To identify specific clinical presentations associated with insular infarcts.

Main Methods:

  • Retrospective analysis of four patients with first-ever acute stroke.
  • MRI confirmation of stroke restricted to the insula.
  • Detailed clinical presentation assessment.

Main Results:

Related Experiment Videos

  • Five main clinical presentation groups were identified: somatosensory deficits (posterior insula), gustatory disorders (left posterior insula), vestibular-like syndrome (posterior insula), cardiovascular disturbances (right posterior insula), and neuropsychological disorders (aphasia, dysarthria, somatoparaphrenia).
  • Posterior insular strokes were associated with pseudothalamic sensory and vestibular-like syndromes.
  • Left insular lesions correlated with aphasia and dysarthria; right insular lesions with somatoparaphrenia, gustatory dysfunction, and hypertensive episodes.

    • Conclusions:

    • Strokes confined to the posterior insula can manifest prominently as pseudothalamic sensory and vestibular-like syndromes.
    • Specific deficits like aphasia, somatoparaphrenia, and gustatory dysfunction are linked to lesion laterality within the insula.
    • Unlike anterior insular strokes, acute dysphagia was not observed in these posterior insular stroke cases.