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Pronunciation: mes'en-sef'a-lot'o-me


  1. The sectioning of any structure in the midbrain, especially of the spinothalamic tracts for the relief of intractable pain or the cerebral peduncle for dyskinesias.
  2. A mesencephalic spinothalamic tractotomy.

[mesencephalon + G. tome, incision]

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.