Related Experiment Videos
[Callosal disconnection syndrome caused by left hemisphere infarction]
M Habib1, M Ceccaldi, M Poncet
1Clinique de Neurologie, CHU Timone, Marseille.
Revue Neurologique
|January 1, 1990
Summary
This case study highlights a callosal syndrome following a stroke, demonstrating specific neurological deficits. Findings emphasize the relevance of callosal symptoms in diagnosing watershed infarcts.
Area of Science:
- Neuroscience
- Neurology
- Clinical Neuroimaging
Background:
- Internal carotid artery occlusion can lead to significant neurological deficits.
- Callosal syndromes present with unique, often subtle, cognitive and motor impairments.
- Understanding corpus callosum function is crucial for localizing brain lesions.
Observation:
- A taxi driver presented with right upper limb weakness and global aphasia post-stroke.
- Residual symptoms included "inner conflict," left unilateral ideomotor apraxia, agraphia, tactile dysnomia, right hand constructional difficulties, and left ear extinction.
- Neuroimaging revealed a left-hemisphere periventricular signal abnormality impacting the posterior corpus callosum.
Findings:
- The patient exhibited classic signs of a callosal syndrome, indicating impaired transfer of information between brain hemispheres.
- Deficits in naming and recognition mirrored findings in split-brain studies.
- MRI confirmed damage to the posterior corpus callosum, sparing anterior fibers.
Implications:
- This case underscores the importance of recognizing callosal syndrome symptoms for accurate diagnosis.
- Understanding the functional localization within the corpus callosum aids in interpreting hemisphere interactions.
- Callosal symptoms can be a crucial diagnostic marker for watershed infarcts.