Double decussated ipsilateral corticospinal tract in schizencephaly

Neuroreport. 2009 Oct 28;20(16):1434-8. doi: 10.1097/WNR.0b013e328331483d.

Abstract

We report a patient with left hemiparesis because of schizencephaly affecting the right precentral gyrus and describe a double decussated ipsilateral corticospinal tract detected using the multimodal brain mapping technique. In this patient, we could observe that the unaffected primary motor cortex (M1) controls both hands by functional magnetic resonance imaging and motor-evoked potential study. We were also able to visualize the corticospinal tract originating from the unaffected M1 that passed through the internal capsule and cerebral peduncle on the same side. It then crossed over twice at the brain stem level to go down to the ipsilateral spinal cord. These findings show a unique pattern of brain reorganization in the recovery from early brain injury.

Publication types

  • Case Reports
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Brain Mapping*
  • Diffusion Tensor Imaging / methods
  • Electric Stimulation / methods
  • Evoked Potentials, Motor / physiology*
  • Functional Laterality / physiology*
  • Humans
  • Image Processing, Computer-Assisted / methods
  • Magnetic Resonance Imaging / methods
  • Male
  • Malformations of Cortical Development / complications
  • Malformations of Cortical Development / pathology*
  • Middle Aged
  • Oxygen / blood
  • Paresis / etiology
  • Paresis / pathology
  • Pyramidal Tracts / blood supply
  • Pyramidal Tracts / physiopathology*
  • Transcranial Magnetic Stimulation / methods

Substances

  • Oxygen