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Truncal contrapulsion in pretectal syndrome.

Jae-Hyeok Heo1, Ji Soo Kim, Kyung-Bok Lee

  • 1Department of Neurology, Seoul National University Hospital, Seoul, Korea.

Journal of Clinical Neurology (Seoul, Korea)
|April 17, 2010
PubMed
Summary

We describe a patient with vertical-gaze palsy and truncal contrapulsion, a condition not previously linked to pretectal syndrome. This likely resulted from mesodiencephalic junction infarction disrupting the crossed cerebellothalamic tract.

Keywords:
ContrapulsionMidbrainPretectal syndrome

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Area of Science:

  • Neuroscience
  • Neurology

Background:

  • Pretectal syndrome is typically associated with specific oculomotor deficits.
  • Truncal contrapulsion, a deviation of the body's posture, has not been previously described in conjunction with pretectal syndrome.

Purpose of the Study:

  • To report a novel case associating vertical-gaze palsy and truncal contrapulsion.
  • To investigate the potential neuroanatomical basis for this combined presentation.

Main Methods:

  • Clinical case report.
  • Neuroimaging (MRI) to identify the location of the infarction.
  • Review of neuroanatomical pathways.

Main Results:

  • A patient presented with vertical-gaze palsy and severe truncal contrapulsion.
  • Infaraction was identified in the mesodiencephalic junction.
  • The findings suggest a link between mesodiencephalic junction lesions and truncal contrapulsion.

Conclusions:

  • Truncal contrapulsion can occur with pretectal syndrome.
  • Disruption of ascending fibers in the crossed cerebellothalamic tract may cause truncal contrapulsion.