Intramodal somaesthetic recognition disorders following right and left hemisphere damage

G. Bottini, S. E. Cappa, R. Sterzi, L. A. Vignolo

Research output: Contribution to journalArticle

Abstract

A dissociation between apperceptive processing after right and left hemisphere respectively, has been suggested for visual, auditory and visuo-tactile matching tasks. This study was aimed at testing for this dissociation in a purely somaesthetic task. Forty consecutive patients with recent right and left hemispheric vascular lesions and 10 normal controls were studied The groups were compared on two intramodal somaesthetic matching tasks, consisting of either meaningless shapes (apperceptive recognition) or meaningful objects (associative recognition). In normal controls, no significant difference was found either between the two tests, indicating a similar degree of difficulty, or between hands. An analysis of variance indicated a differential impairment of the two hemisphere-damaged groups on the two tests in comparison with normal controls. Right hemisphere lesions impaired the apperceptive, but not the associative, task while the reverse occurred after left hemisphere lesions. This double dissociation between side of hemispheric lesion (right and left) and level of recognition impairment (apperceptive and associative) extends the results reported for other sensory modalities to intramodal tactile recognition matching.

Original languageEnglish
Pages (from-to)395-399
Number of pages5
JournalBrain
Volume118
Issue number2
Publication statusPublished - 1995

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Keywords

  • Aphasia
  • Hemispheric specialization
  • Somaesthesis
  • Tactile agnosia

ASJC Scopus subject areas

  • Agricultural and Biological Sciences (miscellaneous)
  • Statistics, Probability and Uncertainty
  • Mathematics(all)
  • Applied Mathematics
  • Statistics and Probability
  • Clinical Neurology
  • Neuroscience(all)

Cite this

Bottini, G., Cappa, S. E., Sterzi, R., & Vignolo, L. A. (1995). Intramodal somaesthetic recognition disorders following right and left hemisphere damage. Brain, 118(2), 395-399.