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ONE AND A HALF SYNDROME AND MRI : ASE REPORT AND FUNCTIONAL NEUROANATOMY OF THE SYNDROME Naokatsu Saeki 1 , Nobuo Oka 1 , Hirokazu Tanno 1 , Akira Yamaura 1 , Hiroyasu Makino 1 1Department of Neurosurgery, School of Medicine, Chiba University Keyword: one and a half syndrome , PPRF , MLF , MRI , pons pp.475-479
Published Date 1990/5/1
DOI https://doi.org/10.11477/mf.1406900055
  • Abstract
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This is a case report of 63 year old men who presented one and a half syndrome with ipsilate-ral peripheral type facial palsy due to lacunar infarct. MRI taken one week after the onset (TR 2000, TE 38) demonstrated small high intensity lesion, 4 mm in diameter, located at the dorsal portion of pontine tegmentum, contacting with the floor of 4 th ventricle. This MRI coincides with the lesion limited to the abducens nucleus and genu of facial nerve. Traditionally, projections from the PPRF to the ipsilateral abducens nucleus and opposite MLF was postulated. Recently, how-ever, experiment on monkey and autopsy cases sho-wed projection from abducens nucleus, instead of PPRF, to the opposite MLF has been proposed. MRI findings in this case support the latter hypo-thesis. It is expected that, with the advent of MRI, more meticulous functional neuroanatomy will be developed.


Copyright © 1990, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 2185-405X 印刷版ISSN 0006-8969 医学書院

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