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KMID : 0860920070090010008
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Journal of the Korean Association EMG-Electrodiagnostic Medicine
2007 Volume.9 No. 1 p.8 ~ p.11
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Relation between Frequeuncy of Synkinesis and Electrodiagnositic Findings after Facial Palsy
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Ahn Kyung-Hoi
Kim Hee-Sang
Lee Jong-Ha
Kim Dong-Hwan
Lee Kyu-Tae
Yun Jee-Sang
Kim Jin-Sung
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Abstract
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Objectives: The frequency of synkinesis after facial palsy has not been clearly defined. We investigatedthe development of synkinesis after facial palsy and its relationship to electrodiagnostic findings.
Methods: In 43 patients with facial palsy, we performed side-to-side comparison of CMAP by placingthe recording electrodes over the nasalis muscle and facial nerve stimulation at stylomastoid fossa to eval-uate the degree of axonal loss. In follow up study, we observed whether the synkinetic spread responsewas found or not during stimulation of supraorbital notch and investigated the relationship between axon-
al loss and frequency of synkinesis.
Results: Electrophysiologically, 26 (60.5%) out of 43 patients showed synkinesis. All of them had more than 40% axonal loss, and had clinical synkinesis except one. It took 144¡¾69 from the onset of facial palsy to the development of synkinesis. With severer axonal loss, the frequency of synkinesis increased (p<0.05). The group of patients who developed synkinesis showed more axonal injury than the group of patients who did not (p<0.05).
Conclusion: The severer the axonal loss, the more frequent the development of synkinesis. Therefore, we need to help patients with severe axonal loss prevent the development of synkinesis.
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KEYWORD
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Synkinesis, Facial palsy
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