| Prognostic Value of Brain Magnetic Resonance Imaging and Blink Reflex in Bell’s Palsy |
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Chang Beom Bae, Dong Kuck Lee |
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| 벨마비에서 뇌 자기공명영상 및 눈깜박 반사의 예후적 가치 |
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배창범, 이동국 |
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| Abstract |
Background
Bell’s palsy is an idiopathic peripheral facial palsy and no readily identifiable cause. There are still controversies regarding the enhancement of the facial nerve on magnetic resonance image (MRI) and its correlation with disease severity, electrophysiological tests, and prognosis. This study is conducted to investigate the correlation between the facial nerve enhancement on MRI, abnormality of electrophysiologic studies and prognosis of Bell’s palsy. Methods: This prospective study includes 391 patients of Bell’s palsy. The severity of facial palsy was assessed by House-Blackmann facial nerve grading scale. Follow-up physical examination and electrophysiologic test were conducted about 12 weeks after the initial assessment. Results: Brain MRI showed that 255 of them had facial nerve enhancement. Patients with facial nerve enhancement had more severe facial palsy than patients without enhancement at the initial assessment (p=0.025). After 12 weeks, House-Blackmann grade between the two group were statistically significant (p=0.042). Patients with abnormality on blink reflex had more severe facial palsy than with normal at time of diagnosis (p |
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