Related Experiment Videos
Hemianesthesia and aphasia. An anatomical and behavioral study
Archives of Neurology
|July 1, 1989
Summary
A brain lesion affecting white matter near the insula caused sudden numbness and speech difficulty. This case highlights how white matter damage can lead to combined sensory and language deficits.
Area of Science:
- Neurology
- Neuroimaging
- Neuropsychology
Background:
- A 61-year-old male with a history of cerebrovascular disease and hypertension presented with acute symptoms.
- The patient experienced sudden onset of right-sided numbness and aphasia.
Observation:
- Neurologic examination revealed dense right hemianesthesia affecting the face, trunk, arm, and leg.
- Neuropsychological testing identified conduction aphasia, which showed significant recovery over several months.
Findings:
- Brain imaging (CT and MRI) identified a lesion in the left hemisphere's posterior insula.
- The lesion disrupted thalamocortical connections but spared the thalamus itself.
Implications:
- The study suggests that lesions in the white matter beneath the inferior parietal and posterior temporal cortices can cause combined hemianesthesia and aphasia.
- This finding underscores the importance of white matter tracts in integrating sensory and language functions.