Acta Neurochirurgica

, Volume 110, Issue 3–4, pp 146–153 | Cite as

Mechanism of mutism following the transcallosal approach to the ventricles

  • Y. Nakasu
  • T. Isozumi
  • H. Nioka
  • J. Handa
Clinical Articles

Summary

Transient mutism has been known as a common manifestation following callosotomy for medically intractable epilepsy, but its cause has not been clearly elucidated. In this paper, we report three cases of mutism following a transcallosal approach to tumours in the lateral and third ventricles and retrospectively analyze the surgical, neurological and radiological features which may suggest the cause of this type of mutism.

Mutism may be a result of division of the corpus callosum. Suppression of the limbic system caused by lesions in the anterior cingulate gyrus, septum pellucidum, and fornix may have been of importance in at least two of these three cases. Impairments of the supplementary motor cortex, thalamus and basal ganglia may also be factors reducing speech production. The mechanism of such transient mutism seems to be a complex of two or more of these factors, and their combinations may be different from one case to the other.

Keywords

Aphasia corpus callosum limbic system mutism transcallosal approach 
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Copyright information

© Springer-Verlag 1991

Authors and Affiliations

  • Y. Nakasu
    • 1
  • T. Isozumi
    • 1
  • H. Nioka
    • 1
  • J. Handa
    • 1
  1. 1.Department of NeurosurgeryShiga University of Medical ScienceOhtsuJapan

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