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Related Experiment Videos

Mesencephalic and associated posterior circulation infarcts.

Emre Kumral1, Gamze Bayulkem, Ali Akyol

  • 1Department of Neurology, Ege University, Izmir, Turkey. ekumral@med.ege.edu.tr

Stroke
|September 7, 2002
PubMed
Summary

Posterior circulation stroke involving the mesencephalon presents diverse clinical syndromes based on arterial territory. Understanding these patterns is crucial for diagnosing and managing this complex stroke type.

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Area of Science:

  • Neurology
  • Neuroscience
  • Vascular Neurology

Background:

  • Posterior circulation stroke affecting the mesencephalon and surrounding structures presents complex clinical challenges.
  • Identifying specific arterial territories involved is key to understanding stroke presentation.

Purpose of the Study:

  • To evaluate risk factors and clinical features of mesencephalon posterior circulation strokes.
  • To correlate clinical syndromes with specific mesencephalic arterial territories involved.

Main Methods:

  • Retrospective analysis of consecutive patients with acute mesencephalon posterior circulation stroke over six years.
  • Classification of stroke based on MRI findings into isolated, distal, middle, and proximal mesencephalic territories.
  • Neurological and radiological investigations including MRI and angiography were performed.

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Main Results:

  • Middle mesencephalon involvement was most common, often affecting the anteromedial territory.
  • Clinical presentations varied significantly by territory, including third-nerve palsy, motor deficits, consciousness disturbances, ataxia, and visual field deficits.
  • Common causes included large-artery disease (39%), cardioembolism (20%), and small-artery disease (24%). Bilateral infarcts were associated with poorer outcomes.

Conclusions:

  • Posterior circulation infarcts involving the mesencephalon exhibit significant topographic and clinical heterogeneity.
  • Comprehensive investigation of both extra- and intracranial arteries, as well as cardiac evaluation, is essential due to diverse underlying causes.