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Ann Clin Neurophysiol > Volume 7(2); 2005 > Article
Ann Clin Neurophysiol. 2005; 7(2): 88-92.
Evaluation of Facial SynkinesisWith Applied Blink Reflex Test
Jung-Mee Kim, Young-Su Han, Jeong-Seon Cho, Sang-Eun Park, Sang Won Ha, Jeong-Ho Han, Eun-Kyoung Cho, and Doo-Eung Kim
Copyright © 2005 The Korean Society of Clinical Neurophysiology
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Blink reflex could be a useful tool to differentiate facial synkinesis as one of complications of facial neuropathy, from volitional associated movements. We had performed applied blink reflex test for 23 patients with objective evidence of hemifacial weakness in which orbicularis oculi muscle(zygomatic branch) and mentalis muscle(mandibular branch) areelectrophysiologically evaluated in response to supraorbital stimulation of trigeminal nerve. For an unaffected side of face there is no evidence of positive blink reflex from the mentalis muscle. We concluded that a positive blink reflex from mentalis muscle is almost always suggestive of chronic facial neuropathy even in clinical silence of facial synkinesis, or an aberrant reinnervation after peripheral facial neuropathy, and does not electrophysiologically correlate with the severity of facial palsy.
Key words: Synkinesis, Blink reflex test, Facial neuropathy
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