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Right-sided neglect following a left subcortical lesion
1Dipartimento di Scienze Neurologiche e della Visione, Sezione di Fisiologia Umana, Università di Verona, Verona, Italy.
Revue Neurologique
|September 9, 2000
Summary
Left-sided brain damage can cause spatial neglect, challenging the typical right-hemisphere cause. This case study highlights left subcortical structures as crucial for spatial representation networks.
Area of Science:
- Neuroscience
- Cognitive Neurology
- Neuropsychology
Background:
- Unilateral spatial neglect (USN) is predominantly associated with right hemisphere lesions affecting left hemispace.
- While right cortical lesions are common causes, right subcortical lesions can also induce USN.
- USN from left hemispheric lesions is infrequent, and from left subcortical lesions, exceptionally rare.
Purpose of the Study:
- To investigate the role of left subcortical structures in spatial representation.
- To document a rare case of hemispatial neglect following left-sided subcortical lesions.
Main Methods:
- Case report of a right-handed male with two sequential left-sided brain lesions over 10 years.
- Assessment of neurological and neuropsychological status following each lesion.
- Clinical observation and documentation of spatial neglect symptoms.
Main Results:
- The initial left occipital lobe lesion caused contralateral hemianopia but no spatial neglect.
- A subsequent left capsulo-thalamic hemorrhage resulted in persistent right-sided spatial neglect.
- This contrasts with the typical presentation of neglect following right hemisphere damage.
Conclusions:
- Left subcortical structures, specifically the capsulo-thalamic region, can be critical for spatial representation.
- This case challenges the traditional view of USN lateralization and suggests left-sided subcortical nodes are vital.
- Further research into the neural networks of spatial representation is warranted.