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Numerical parameters in millimeters were obtained as indicative values of the shifting of the face points, of the shift differences of the two face sides and the shifting ratio between the healthy (denominator) and the affected side (numerator), i.e., the asymmetry index for the two movements.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>For each HB grade, specific asymmetry index ranges were identified with a positive correlation for shift differences and negative correlation for asymmetry indexes.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>The use of the present objective system enabled the identification of numerical ranges of asymmetry between the healthy and the affected side that were consistent with the outcome from the subjective methods currently in use.<\/jats:p><\/jats:sec>","DOI":"10.1007\/s00405-021-06682-z","type":"journal-article","created":{"date-parts":[[2021,3,15]],"date-time":"2021-03-15T05:02:26Z","timestamp":1615784546000},"page":"3541-3550","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["An objective, markerless videosystem for staging facial palsy"],"prefix":"10.1007","volume":"278","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3001-2347","authenticated-orcid":false,"given":"S.","family":"Monini","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"S.","family":"Ripoli","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"C.","family":"Filippi","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"I.","family":"Fatuzzo","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"G.","family":"Salerno","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"E.","family":"Covelli","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"F.","family":"Bini","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"F.","family":"Marinozzi","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"S.","family":"Marchelletta","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"G.","family":"Manni","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0740-0384","authenticated-orcid":false,"given":"M.","family":"Barbara","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2021,3,15]]},"reference":[{"issue":"2","key":"6682_CR1","doi-asserted-by":"publisher","first-page":"146","DOI":"10.1177\/019459988509300202","volume":"93","author":"JW House","year":"1985","unstructured":"House JW, Brackmann DE (1985) Facial nerve grading system. 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