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Ipsilateral hemiparesis in ischemic stroke patients.
Y Inatomi1, M Nakajima2, T Yonehara1
1Department of Neurology, Saiseikai Kumamoto Hospital, Kumamoto, Japan.
Acta Neurologica Scandinavica
|September 27, 2016
Summary
Ipsilateral hemiparesis in ischemic stroke patients is rare, often linked to prior strokes. Neuroimaging reveals an active crossed corticospinal tract, suggesting the uncrossed tract compensates for motor deficits.
Area of Science:
- Neuroscience
- Neurology
- Clinical Medicine
Background:
- Ipsilateral hemiparesis, weakness on the same side as a brain lesion, is uncommon in ischemic stroke.
- Understanding its underlying mechanisms is crucial for stroke rehabilitation and management.
Purpose of the Study:
- To investigate the clinical characteristics and neuroimaging findings of patients experiencing ipsilateral hemiparesis following an acute ischemic stroke.
Main Methods:
- Prospective examination of acute ischemic stroke patients.
- Definition of ipsilateral hemiparesis relative to recent stroke lesions.
- Utilized functional neuroimaging, including transcranial magnetic stimulation (TMS) and functional MRI.
Main Results:
- Identified 14 cases (0.17%) of ipsilateral hemiparesis among 8360 ischemic stroke patients.
- Lesions were primarily along the corticospinal tract; most patients had prior contralateral strokes with motor deficits.
- TMS and functional MRI showed evidence of both ipsilateral and contralateral corticospinal tract activation.
Conclusions:
- A history of contralateral stroke with motor deficits is common in patients with ipsilateral hemiparesis.
- Functional neuroimaging suggests the crossed corticospinal tract is active, and the uncrossed tract may compensate for motor deficits post-stroke.
