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Evaluation of Trigeminal Nerve Involvement Using Blink Reflex Test in Bell’s Palsy

 Ki Bong Lee  ;  Ji Hoon Kim  ;  Yoon Ah Park  ;  Yoon Gil Park  ;  Won-Sang Lee  ;  Eun Jin Son 
 Korean Journal of Audiology (대한청각학회지), Vol.15(3) : 129-132, 2011 
Journal Title
Korean Journal of Audiology(대한청각학회지)
Issue Date
Bell’s palsy ; Blink reflex ; Trigeminal nerve
Background and Objectives: Facial nerve dysfunction in Bell's palsy is evaluated using various parameters including physical examination and electrophysiological studies. Associated symptoms of facial numbness or paresthesia are reported by some patients with Bell's palsy. The aim of this study was to investigate trigeminal nerve involvement in Bell's palsy using blink reflex test.

Subjects and Methods: Facial nerve and trigeminal nerve functions were assessed using House-Brackmann (HB) grading system, electroneuronography (ENoG) and blink reflex tests in 28 patients diagnosed as Bell's palsy.

Results: HB grades correlated with degeneration ratio from ENoG (p=0.002, chi-square test). The ipsilateral R1 reponse of the blink reflex was absent or abnormal in 27/28 patients (96.4%), and ipsilateral R2 response was absent or abnormal in 26/28 patients (92.8%). Contralateral R2 was abnormal in 5/28 patients (17.8%), suggesting involvement of trigeminal nerve in a portion of patients. The results of blink reflex test showed no significant correlation to the outcome of facial nerve function (HB grade) in Bell's palsy patients.

Conclusions: Blink reflex test provides information about trigeminal and facial nerve functions in addition to ENoG results. Our study suggests that subclinical involvement of trigeminal nerve may accompany facial nerve dysfunction in Bell's palsy.
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1. College of Medicine (의과대학) > Dept. of Otorhinolaryngology (이비인후과학교실) > 1. Journal Papers
1. College of Medicine (의과대학) > Dept. of Rehabilitation Medicine (재활의학교실) > 1. Journal Papers
Yonsei Authors
Park, Yoon Ghil(박윤길) ORCID logo https://orcid.org/0000-0001-9054-5300
Son, Eun Jin(손은진)
Lee, Won Sang(이원상)
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