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Updated: Jul 4, 2026

Brain Infarct Segmentation and Registration on MRI or CT for Lesion-symptom Mapping
Published on: September 25, 2019
[Sensory syndrome and aphasia after left insular infarct]
A Peskine1, A Galland, A Weill Chounlamountry
1Service de médecine et réadaptation, groupe hospitalier Pitié-Salpêtrière, 47-83, boulevard de l'Hôpital, 75651 Paris cedex 13, France. anne.peskine@psl.aphp.fr
Introduction:
Sensorial impairment without hemiplegia is usually caused by a thalamic lesion.
Case Report:
A 28-year-old woman presented with hemianesthesia associated with aphasia following a left insular lesion, subsequent to subarachnoid hemorrhage. Brain MRI Flair sequence revealed a high intensity signal in the left insular and frontal subcortical regions. Insular infarct was diagnosed, associated with hemorrhagic sequelae.
Discussion/Conclusion:
Study of the normal and pathologic insular cortex suggest several implications of the region in somatosensory and language functions. However, the insular cortex has been mainly associated with central pain. Lasting objective hypoesthesia has been very rarely documented. The left insular cortex has also been implicated in speech apraxia but our patient presented with fluent aphasia mostly affecting the rhythm of speech, as it has been observed in thalamic aphasia.
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