{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,2]],"date-time":"2026-06-02T09:40:10Z","timestamp":1780393210218,"version":"3.54.1"},"reference-count":22,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2019,12,24]],"date-time":"2019-12-24T00:00:00Z","timestamp":1577145600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["aao-hnsfjournals.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Otolaryngol.--head neck surg."],"published-print":{"date-parts":[[2020,2]]},"abstract":"<jats:sec><jats:title>Objective<\/jats:title><jats:p>This study aimed to investigate the utility of facial nerve ultrasonography in the functional and structural assessment of early\u2010stage Bell\u2019s palsy and the prognostic value of facial nerve ultrasonography in Bell\u2019s palsy.<\/jats:p><\/jats:sec><jats:sec><jats:title>Study Design<\/jats:title><jats:p>Prospective longitudinal study.<\/jats:p><\/jats:sec><jats:sec><jats:title>Setting<\/jats:title><jats:p>Single center, a university\u2010affiliated neurology clinic.<\/jats:p><\/jats:sec><jats:sec><jats:title>Subjects and Methods<\/jats:title><jats:p>Patients with unilateral Bell\u2019s palsy who had visited our clinic within 3\u00a0days of symptom onset were enrolled in this study. Demographic information and House\u2010Brackmann grade were collected. Electrophysiologic studies and facial nerve ultrasonography were then performed. The facial nerves on each side were scanned longitudinally with a 5\u2010 to 12\u2010MHz probe. The diameter of the facial nerves with and without the sheath was measured at the proximal and distal portions. Follow\u2010up examinations, including House\u2010Brackmann grade analysis, electrophysiologic studies, and facial nerve ultrasonography, were performed after 2\u00a0months.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Fifty\u2010four patients with unilateral Bell\u2019s palsy were enrolled, and 22 underwent the follow\u2010up examinations. The diameters of the facial nerves were larger on the affected side than on the unaffected side at the proximal and distal portions (<jats:italic>P<\/jats:italic> &lt;. 01). On the affected side, the enlarged facial nerve at the proximal portion had decreased in size after 2\u00a0months (<jats:italic>P<\/jats:italic> &lt;. 05). The initial ultrasonography findings were positively correlated with the initial severity of Bell\u2019s palsy, but they did not predict prognosis.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>Ultrasonography could be a useful tool for evaluating the facial nerve in Bell\u2019s palsy. Nevertheless, further studies are needed to demonstrate its prognostic value.<\/jats:p><\/jats:sec>","DOI":"10.1177\/0194599819896298","type":"journal-article","created":{"date-parts":[[2019,12,24]],"date-time":"2019-12-24T04:46:36Z","timestamp":1577162796000},"page":"186-192","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":22,"title":["The Utility of Facial Nerve Ultrasonography in Bell\u2019s Palsy"],"prefix":"10.1002","volume":"162","author":[{"given":"Seol\u2010Hee","family":"Baek","sequence":"first","affiliation":[{"name":"Department of Neurology Korea University Anam Hospital Korea University College of Medicine Seoul Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yoo Hwan","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Neurology Hangang Sacred Heart Hospital Hallym University College of Medicine Seoul Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ye\u2010Ji","family":"Kwon","sequence":"additional","affiliation":[{"name":"Department of Neurology Korea University Anam Hospital Korea University College of Medicine Seoul Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Joo Hye","family":"Sung","sequence":"additional","affiliation":[{"name":"Department of Neurology Korea University Anam Hospital Korea University College of Medicine Seoul Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Myeong Hun","family":"Son","sequence":"additional","affiliation":[{"name":"Department of Neurology Korea University Anam Hospital Korea University College of Medicine Seoul Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jung Hun","family":"Lee","sequence":"additional","affiliation":[{"name":"Department of Neurology Korea University Anam Hospital Korea University College of 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