pyramidotomy

Section of pyramidal tracts, in the spinal cord, for the relief of involuntary movements. [G. pyramis, pyramid, + tome, incision]

- medullary p. a medullary pyramidal tractotomy.

- spinal p. a spinal pyramidal tractotomy.

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py·ram·i·dot·o·my pə-.ram-ə-'dät-ə-mē n, pl -mies a surgical procedure in which a corticospinal tract is severed (as for relief of parkinsonism)

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py·ram·i·dot·o·my (pĭ″ram-ĭ-dotґə-me) section of the pyramidal tract.