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Sensory syndromes in parietal stroke
C Bassetti1, J Bogousslavsky, F Regli
1Department of Neurology, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland.
Neurology
|October 1, 1993
Summary
Acute parietal stroke can cause distinct sensory syndromes, including pseudothalamic and cortical types, based on lesion location. These syndromes involve specific sensory losses, not a "pure sensory stroke".
Area of Science:
- Neurology
- Neuroscience
- Stroke Research
Background:
- Parietal lobe strokes can manifest with diverse sensory deficits.
- Understanding the specific topographic correlations of these deficits is crucial for accurate diagnosis and localization.
Purpose of the Study:
- To classify distinct sensory syndromes resulting from acute parietal strokes.
- To correlate specific parietal lesion locations with observed sensory deficits and associated neuropsychological impairments.
Main Methods:
- Studied 20 patients with acute parietal stroke and hemisensory disturbances.
- Utilized CT and MRI to exclude thalamic involvement and identify lesion topography.
- Classified sensory deficits into pseudothalamic, cortical, and atypical syndromes based on modality and distribution.
Main Results:
- Identified three main parietal stroke-related sensory syndromes: pseudothalamic (elementary sensation loss), cortical (discriminative sensation loss), and atypical.
- Pseudothalamic syndrome correlated with inferior-anterior parietal lesions (parietal operculum, posterior insula).
- Cortical syndrome correlated with superior-posterior parietal lesions. Conduction aphasia was associated with right-sided pseudothalamic deficits.
Conclusions:
- Parietal stroke topography dictates the specific sensory syndrome presentation.
- Sensory deficits can be monosymptomatic but do not present as a complete "pure sensory stroke" affecting all body parts and modalities simultaneously.