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Subcortical aphasia: three different language disorder syndromes?

D C Kuljic-Obradovic1

  • 1Sveti Sava Hospital, Nemanjina, Belgrade, Yugoslavia. ukisrki@eunet.yu

European Journal of Neurology
|June 26, 2003
PubMed
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This study differentiates subcortical aphasia types by lesion location. Findings reveal distinct language impairments in striato-capsular, white matter, and thalamic aphasia, aiding diagnosis.

Area of Science:

  • Neurology
  • Linguistics
  • Neuroimaging

Background:

  • Subcortical aphasia, resulting from stroke, presents diverse clinical manifestations.
  • Understanding the specific language deficits associated with different subcortical lesion locations is crucial for targeted rehabilitation.

Purpose of the Study:

  • To analyze and differentiate the clinical presentation of language functions in patients with subcortical aphasia based on lesion localization.
  • To identify specific language impairment features distinguishing striato-capsular, white matter paraventricular, and thalamic aphasia.

Main Methods:

  • Clinical analysis of 32 stroke-induced subcortical aphasia patients.
  • Neuroanatomic localization via CT and MRI scans.
  • Assessment using Boston Diagnostic Aphasia Examination (BDAE), Boston Naming Test (BNT), Token Test, and Verbal Fluency Test.

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Main Results:

  • Subcortical aphasias generally show preserved repetition but differ in specific deficits.
  • Striato-capsular and white matter lesions cause non-fluent speech, literary paraphasias, and relatively intact comprehension/naming.
  • Thalamic aphasia presents with fluent speech, impaired comprehension/naming, and verbal paraphasias.

Conclusions:

  • Subcortical structures play a significant role in language organization.
  • Striato-capsular aphasia is primarily characterized by phonetic impairment.
  • Thalamic aphasia appears to involve lexical-semantic processing deficits.