Difference between transcortical sensory aphasia following the left frontal lesion and transcortical sensory aphasia following the left posterior lesion

Mika Otsuki, Yoshiaki Soma, Kenjyu Aoki, Osamu Iizuka, Akira Koyama, Nahoko Yoshimura, Masaki Sahara, Hiroko Nagai, Ryoko Koike, Shoji Tsuji

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

We assessed the difference between transcortical sensory aphasia (TCSA) following the left frontal lesions (F-TCSA) and TCSA following the left posterior lesions (P-TCSA). All the patients were right-handed and the 7 patients had the lesions in the only frontal lobe and the 10 patients had the lesions only in the left temporo-parieto-occipital regions. We administered pointing tasks, using 90 line drawings representing single nouns. We presented 6 line drawings a pointing board, and we used two kinds of pointing boards: one showed the line drawings each belonging to different categories (random categorized pointing task), the other showed the line drawings each belonging to only either two different categories (two categorized pointing task) and we presented 15 pointing boards each alternatively. The result was that regarding the patients of P TCSA showed different number of correct answers between the random categorized pointing task and the two categorized pointing task with statistical significance. Regarding the patients of F- TCSA showed no difference between them. The results indicated that disturbance of P-TCSA on the pointing task was the disturbance of semantic process per se. And the disturbance of F-TCSA on the pointing task was that of not only semantic process but also the whole process including comprehending the presented words, searching the line drawings, comparing the line drawings with the presented word and final selection, which demanded persistent multiple memory process consistent with working memory.

Original languageEnglish
Pages (from-to)995-1002
Number of pages8
JournalBrain and Nerve
Volume50
Issue number11
Publication statusPublished - 1998 Nov

Keywords

  • Comprehension
  • Frontal lobe
  • Pointing task
  • Transcortical sensory aphasia
  • Working memory

ASJC Scopus subject areas

  • Neuroscience(all)

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