[Cerebral peduncle infarction with pure dysarthria--case report]
Satoshi Kataoka1, Hideo Terasawa, Hiromasa Touji
1Department of Neurology, Chugoku Rosai Hospital, 1-5-1 Hirotagaya, Kure, Hiroshima 737-0193, Japan.
Brain and Nerve = Shinkei Kenkyu No Shinpo
|August 24, 2007
Summary
A small lesion in the brainstem caused pure dysarthria in an elderly male with hypertension. This finding highlights the corticobulbar tract
Area of Science:
- Neurology
- Neuroimaging
- Vascular Neurology
Background:
- Hypertension is a significant risk factor for cerebrovascular events.
- Dysarthria can result from various neurological conditions affecting motor speech control.
Observation:
- An 82-year-old male with a history of hypertension presented with new-onset dysarthria.
- Neurological examination revealed dysarthria and mild left-sided soft palate weakness, with no other focal neurological deficits.
- Brain imaging identified a small lesion in the medial left cerebral peduncle and bilateral stenoses in the posterior cerebral arteries.
Findings:
- The lesion's location in the medial cerebral peduncle correlates with the corticobulbar tract supplying speech-related cranial nerves.
- The identified vascular lesions, particularly posterior cerebral artery stenosis, may have contributed to the ischemic event.
Implications:
- This case illustrates that pure dysarthria can be a focal neurological sign of a lacunar infarct or other small vessel disease.
- Understanding the precise localization of lesions is crucial for diagnosing the cause of dysarthria.
- Early identification and management of vascular risk factors like hypertension are essential for preventing such neurological deficits.
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