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Updated: Aug 1, 2025

Electroencephalography Network Indices as Biomarkers of Upper Limb Impairment in Chronic Stroke
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Ipsilateral weakness caused by ipsilateral stroke: A case series.

Naim I Kajtazi1, Mohammed Bafaquh2, Tanvir Rizvi3

  • 1Department of Neurology, National Neuroscience Institute, King Fahad Medical City, Riyadh, Saudi Arabia; Department of Neurology, Prince Sultan Military Medical City, Riyadh, Saudi Arabia.

Journal of Stroke and Cerebrovascular Diseases : the Official Journal of National Stroke Association
|April 27, 2023
PubMed
Summary

Ipsilateral weakness after stroke is rare but possible. This study suggests functional reorganization of corticospinal pathways may explain this phenomenon in stroke patients.

Keywords:
Hemorrhagic strokeIpsilateral strokeIpsilateral weaknessIschemic stroke

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Area of Science:

  • Neurology
  • Neuroscience
  • Stroke Medicine

Background:

  • Ipsilateral weakness following stroke is an uncommon neurological presentation.
  • Previous cases are often attributed to damage in uncrossed corticospinal tract (CST) components.

Purpose of the Study:

  • To report and analyze cases of acute ipsilateral weakness or numbness after stroke.
  • To investigate potential mechanisms underlying this rare neurological event.

Main Methods:

  • Retrospective case series involving six patients from three Saudi Arabian medical institutions.
  • Detailed clinical evaluation and stroke workup were performed for all patients.

Main Results:

  • Six patients presented with acute ipsilateral weakness or numbness post-stroke.
  • Affected brain regions included the corona radiata, internal capsule, basal ganglia, insula, and thalamus.
  • No contralateral hemisphere or brainstem lesions were observed.

Conclusions:

  • Stroke, both ischemic and hemorrhagic, can rarely cause ipsilateral weakness or numbness.
  • Functional reorganization of corticospinal pathways within the ipsilateral hemisphere is a proposed mechanism.