{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,1]],"date-time":"2026-04-01T23:21:16Z","timestamp":1775085676346,"version":"3.50.1"},"reference-count":28,"publisher":"MDPI AG","issue":"6","license":[{"start":{"date-parts":[[2022,3,19]],"date-time":"2022-03-19T00:00:00Z","timestamp":1647648000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Programme Hospitalier de Recherche Clinique from the French Health Ministry. (2014)","award":["PHRC-14-0058"],"award-info":[{"award-number":["PHRC-14-0058"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>This study compares two methods to quantify the amplitude and frequency of head movements in patients with head tremor: one based on video-based motion analysis, and the other using a miniature wireless inertial magnetic motion unit (IMMU). Concomitant with the clinical assessment of head tremor severity, head linear displacements in the frontal plane and head angular displacements in three dimensions were obtained simultaneously in forty-nine patients using one video camera and an IMMU in three experimental conditions while sitting (at rest, counting backward, and with arms extended). Head tremor amplitude was quantified along\/around each axis, and head tremor frequency was analyzed in the frequency and time-frequency domains. Correlation analysis investigated the association between the clinical severity of head tremor and head linear and angular displacements. Our results showed better sensitivity of the IMMU compared to a 2D video camera to detect changes of tremor amplitude according to examination conditions, and better agreement with clinical measures. The frequency of head tremor calculated from video data in the frequency domain was higher than that obtained using time-frequency analysis and those calculated from the IMMU data. This study provides strong experimental evidence in favor of using an IMMU to quantify the amplitude and time-frequency oscillatory features of head tremor, especially in medical conditions.<\/jats:p>","DOI":"10.3390\/s22062385","type":"journal-article","created":{"date-parts":[[2022,3,20]],"date-time":"2022-03-20T21:37:17Z","timestamp":1647812237000},"page":"2385","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Quantification of Head Tremors in Medical Conditions: A Comparison of Analyses Using a 2D Video Camera and a 3D Wireless Inertial Motion Unit"],"prefix":"10.3390","volume":"22","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9292-2429","authenticated-orcid":false,"given":"David","family":"Amarantini","sequence":"first","affiliation":[{"name":"Toulouse NeuroImaging Center (ToNIC), Inserm, UPS, Universit\u00e9 de Toulouse, 31024 Toulouse, France"}]},{"given":"Isabelle","family":"Rieu","sequence":"additional","affiliation":[{"name":"Department of Neurology, CNRS, CHU Clermont-Ferrand, Institut Pascal, Universit\u00e9 Clermont-Auvergne, 63001 Clermont-Ferrand, France"}]},{"given":"Giovanni","family":"Castelnovo","sequence":"additional","affiliation":[{"name":"Service de Neurologie, Centre Hospitalier Universitaire Caremeau, 30029 N\u00eemes, France"}]},{"given":"Fr\u00e9d\u00e9rique","family":"Fluch\u00e8re","sequence":"additional","affiliation":[{"name":"Department of Neurology and Movement Disorders, Timone Hospital, Aix-Marseille Universit\u00e9, 13005 Marseille, France"}]},{"given":"Chlo\u00e9","family":"Laurencin","sequence":"additional","affiliation":[{"name":"Universit\u00e9 de Lyon, Universit\u00e9 Claude Bernard Lyon 1, Lyon Neuroscience Research Center, INSERM, U 1028, CNRS, UMR 5292, Neuroplasticity and Neuropathology of Olfactory Perception team, 69000 Lyon, France"},{"name":"Service de Neurologie C, Pierre Wertheimer Neurological Hospital, Hospices Civils de Lyon (HCL), 69000 Lyon, France"}]},{"given":"Bertrand","family":"Degos","sequence":"additional","affiliation":[{"name":"Service de Neurologie, APHP, H\u00f4pital Avicenne, Universit\u00e9 Sorbonne Paris Nord, 93000 Bobigny, France"},{"name":"Dynamics and Pathophysiology of Neuronal Networks Team, Center for Interdisciplinary Research in Biology, Coll\u00e8ge de France, CNRS UMR7241\/Inserm U1050, Universit\u00e9 Paris Sciences & Lettres (PSL), 75005 Paris, France"}]},{"given":"Aur\u00e9lia","family":"Poujois","sequence":"additional","affiliation":[{"name":"Neurology Department, Rothschild Foundation Hospital, 75019 Paris, France"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6501-5401","authenticated-orcid":false,"given":"Alexandre","family":"Kreisler","sequence":"additional","affiliation":[{"name":"Service de Neurologie A, Movement Disorders Unit, CHU Lille, 59037 Lille, France"}]},{"given":"Sophie","family":"Sangla","sequence":"additional","affiliation":[{"name":"Unit\u00e9 Parkinson, H\u00f4pital Fondation Rothschild, 75019 Paris, France"}]},{"given":"M\u00e9lissa","family":"Tir","sequence":"additional","affiliation":[{"name":"Department of Neurology and the Department of Neurosurgery, Expert Centre for Parkinson\u2019s Disease, Amiens University Hospital, 80054 Amiens, France"},{"name":"EA 4559 Laboratoire de Neurosciences Fonctionnelles et Pathologie (LNFP), University of Picardy Jules Verne (UPJV), 80054 Amiens, France"}]},{"given":"Isabelle","family":"Benatru","sequence":"additional","affiliation":[{"name":"Department of Neurology, University Hospital of Poitiers, 86000 Poitiers, France"},{"name":"INSERM, CHU de Poitiers, University of Poitiers, Centre d\u2019Investigation Clinique CIC1402, 86000 Poitiers, France"}]},{"given":"Genevi\u00e8ve","family":"Blanchet-Fourcade","sequence":"additional","affiliation":[{"name":"Service de Neurologie, Narbonne Hospital Centre, 11100 Narbonne, France"}]},{"given":"Dominique","family":"Guehl","sequence":"additional","affiliation":[{"name":"Centre Hospitalier Universitaire de Bordeaux, Institut des Maladies Neurod\u00e9g\u00e9n\u00e9ratives, CNRS, University of Bordeaux, 33000 Bordeaux, France"}]},{"given":"Dominique","family":"Gayraud","sequence":"additional","affiliation":[{"name":"Service de Neurologie, Centre Hospitalier Intercommunal Aix-Pertuis, Site d\u2019Aix-en-Provence, Avenue des Tamaris, 13616 Aix-en-Provence, France"}]},{"given":"Laurent","family":"Tatu","sequence":"additional","affiliation":[{"name":"Department of Neuromuscular Diseases and Department of Anatomy, CHRU Besan\u00e7on, University of Franche-Comt\u00e9, 25030 Besan\u00e7on, France"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2895-1292","authenticated-orcid":false,"given":"Christine","family":"Tranchant","sequence":"additional","affiliation":[{"name":"Department of Neurology, CHU Hautepierre, 67000 Strasbourg, France"}]},{"given":"Franck","family":"Durif","sequence":"additional","affiliation":[{"name":"Department of Neurology, CNRS, CHU Clermont-Ferrand, Institut Pascal, Universit\u00e9 Clermont-Auvergne, 63001 Clermont-Ferrand, France"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2278-0410","authenticated-orcid":false,"given":"Marion","family":"Simonetta-Moreau","sequence":"additional","affiliation":[{"name":"Toulouse NeuroImaging Center (ToNIC), Inserm, UPS, Universit\u00e9 de Toulouse, 31024 Toulouse, France"},{"name":"Department of Neurology, University Hospital of Toulouse, 31300 Toulouse, France"},{"name":"Clinical Investigation Center (CIC 1436), Toulouse University Hospital, INSERM, 31059 Toulouse, France"}]}],"member":"1968","published-online":{"date-parts":[[2022,3,19]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"75","DOI":"10.1002\/mds.27121","article-title":"Consensus Statement on the classification of tremors. from the task force on tremor of the 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