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Persistent Klüver-Bucy syndrome after bilateral thalamic infarction
A Müller1, R W Baumgartner, C Röhrenbach
1Department of Neurology, University Hospital, Zürich, Switzerland.
Summary
A patient developed partial Klüver-Bucy syndrome from small thalamic lesions, revealing new insights into brain function. This case highlights the thalamus's role in regulating emotions and impulses.
Area of Science:
- Neuroscience
- Neurology
- Clinical Case Study
Background:
- Klüver-Bucy syndrome (KBS) is typically associated with extensive bilateral limbic system lesions.
- Previous cases lacked precise anatomical localization, hindering understanding of KBS's neurobiological underpinnings.
Observation:
- A patient presented with a partial Klüver-Bucy syndrome characterized by amnesia, distractibility, hyperorality, and emotional dysregulation.
- Neuroimaging revealed small, bilateral ischemic lesions specifically in the thalami, affecting the territories of the thalamoperforating arteries.
Findings:
- Positron emission tomography (PET) demonstrated reduced glucose metabolism in the anterior ventral thalami and fronto-temporal cortices.
- These findings correlate specific diencephalic damage with a distinct behavioral phenotype.
Implications:
- This case suggests that isolated diencephalic lesions, particularly in the thalami, can precipitate a partial Klüver-Bucy syndrome.
- The results support the hypothesis that disrupted thalamocortical and limbic pathways are critical for impulse and emotional control.