Somesthetic disconnection syndromes in patients with callosal lesions

Nami Ihori*, Mitsuru Kawamura, Kazuyoshi Fukuzawa, Mutsuo Kamaki

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)


Somesthetic disconnection syndromes were investigated in relation to the sites of lesions in the corpus callosum in 3 patients with callosal lesions, in order to identify the callosal regions responsible for the interhemispheric transfer of somesthetic information. Cases 1 and 2 with lesions in the posterior truncus exhibited transfer deficits of discriminative sensations between the left and right hands, left-sided tactile anomia and left-sided somesthetic alexia. Case 3 with lesions in the posteroventral part of the posterior truncus showed no signs of somesthetic disconnection syndromes. The results suggest the importance of the anterior and/or dorsal part of the posterior truncus of the corpus callosum for interhemispheric transfer of the discriminative sensations and integrated somesthetic information necessary for tactile naming and somesthetic reading. Copyright (C) 2000 S. Karger AG, Basel.

Original languageEnglish
Pages (from-to)65-71
Number of pages7
JournalEuropean Neurology
Issue number2
Publication statusPublished - 2000 Aug


  • Callosal disconnection syndromes
  • Discrimative sensation
  • Posterior truncus, corpus callosum
  • Somesthetic reading
  • Tactile naming

ASJC Scopus subject areas

  • Neurology
  • Clinical Neurology


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