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Related Experiment Video

Updated: Sep 15, 2025

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Acute temporal lesions are associated with phonological word verification errors.

Melissa D Stockbridge1, Jonathan H Venezia2,3, Andreia V Faria4

  • 1Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, 21287, USA.

Brain Network Disorders
|July 16, 2025
PubMed
Summary

Individuals with left temporal lobe stroke showed impaired phonological discrimination. This confirms the left superior temporal lobe

Keywords:
LanguageLinguisticsStrokeTemporal lobe

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Area of Science:

  • Neuroscience
  • Psycholinguistics
  • Neurolinguistics

Background:

  • The dual stream model posits bilateral dorsal superior temporal gyrus (STG) involvement in spectro-temporal analysis.
  • The precise lateralization of phonological discrimination at the word level remains debated.
  • Previous models suggest the mid-posterior superior temporal sulcus processes higher-level phonological codes.

Purpose of the Study:

  • To investigate phonological discrimination deficits in acute stroke patients with left temporal lobe lesions.
  • To compare performance between patients with left temporal lobe lesions, left extratemporal lesions, and right hemisphere lesions.
  • To quantify the left-hemisphere bias in phonological processing.

Main Methods:

  • 114 acute stroke patients underwent MRI and a word-picture verification task with phonological and semantic foils.
  • Participants were categorized by stroke laterality (left, right, bilateral) and temporal lobe involvement.
  • Quantile regression analysis controlled for lesion volume, age, and sex.

Main Results:

  • Over half of the participants performed the phonological discrimination task effectively.
  • Patients with left temporal lobe lesions were significantly more likely to exhibit poor performance.
  • No specific comparison was made regarding right hemisphere stroke performance in the provided text.

Conclusions:

  • The findings support a crucial role for the left superior temporal lobe, including the STG, in phonological processing during word recognition.
  • A subset of individuals (<50%) demonstrates a left-lateralized bias in discriminating phonologically similar words.
  • The study quantifies the impact of left temporal lobe lesions on phonological discrimination abilities.