{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,21]],"date-time":"2026-09-21T02:40:21Z","timestamp":1789958421628,"version":"4.0.1"},"reference-count":14,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2025,4,27]],"date-time":"2025-04-27T00:00:00Z","timestamp":1745712000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Muscle and Nerve"],"published-print":{"date-parts":[[2025,7]]},"abstract":"<jats:title>ABSTRACT<\/jats:title><jats:sec><jats:title>Introduction\/Aims<\/jats:title><jats:p>Neuromuscular ultrasound (NMUS), initially performed by physicians, is increasingly performed by technicians in many electrodiagnostic (EDX) laboratories for certain studies under physician supervision. The aims of this study were to determine: (1) the reproducibility of nonphysician sonographers' assessments of the median nerve and (2) the need for ongoing training to maintain the reproducibility and reliability of median nerve ultrasound assessments.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>The median nerve was examined sonographically in a healthy volunteer by 12 nonphysicians on 3 separate occasions: Day 1 and then 2\u2009weeks (Day 2) and 4\u2009months (Day 3) later. Cross\u2010sectional area (CSA) and wrist\u2010to\u2010forearm ratios (WFRs) were calculated each time. Sonographers were retrained prior to Day 2. Reproducibility and reliability were determined using coefficients of variation calculated for each characteristic for each day and each nonphysician sonographer, comparing performance across the 3 time points.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>There was overall less variation for each characteristic (wrist CSA, forearm CSA, and WFR) on Day 2 compared to Day 1 (coefficients of variation 3.0%, 5.4%, and 5.7% vs. 8.8%, 15.5%, and 11.3%, respectively), both when viewed at the group and individual levels, indicating an improvement in reproducibility and reliability after the retraining session. The improvement was similar for Day 3.<\/jats:p><\/jats:sec><jats:sec><jats:title>Discussion<\/jats:title><jats:p>This study demonstrates the need for training and subsequent retraining sessions to ensure the reproducibility and reliability of NMUS measurements in the median nerve.<\/jats:p><\/jats:sec>","DOI":"10.1002\/mus.28424","type":"journal-article","created":{"date-parts":[[2025,4,28]],"date-time":"2025-04-28T06:26:48Z","timestamp":1745821608000},"page":"130-133","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Neuromuscular Ultrasound Assessment of the Median Nerve at the Wrist and Forearm: A Reproducibility and Reliability Study in Nonphysician Sonographers"],"prefix":"10.1002","volume":"72","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2725-1825","authenticated-orcid":false,"given":"James B.","family":"Meiling","sequence":"first","affiliation":[{"name":"Department of Physical Medicine and Rehabilitation Mayo Clinic  Rochester Minnesota USA"},{"name":"Department of Neurology Mayo Clinic  Rochester Minnesota USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Andrea J.","family":"Boon","sequence":"additional","affiliation":[{"name":"Department of Physical Medicine and Rehabilitation Mayo Clinic  Rochester Minnesota USA"},{"name":"Department of Neurology Mayo Clinic  Rochester Minnesota USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Eric J.","family":"Sorenson","sequence":"additional","affiliation":[{"name":"Department of Neurology Mayo Clinic  Rochester Minnesota USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"William J.","family":"Litchy","sequence":"additional","affiliation":[{"name":"Department of Neurology Mayo Clinic  Rochester Minnesota USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2025,4,27]]},"reference":[{"key":"e_1_2_10_2_1","doi-asserted-by":"publisher","DOI":"10.1002\/mus.23389"},{"key":"e_1_2_10_3_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1552\u20106569.2008.00256.x"},{"key":"e_1_2_10_4_1","doi-asserted-by":"publisher","DOI":"10.1002\/mus.23900"},{"key":"e_1_2_10_5_1","doi-asserted-by":"publisher","DOI":"10.1002\/mus.27001"},{"key":"e_1_2_10_6_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.msksp.2017.08.001"},{"key":"e_1_2_10_7_1","doi-asserted-by":"publisher","DOI":"10.1002\/mus.23621"},{"key":"e_1_2_10_8_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jhsa.2015.07.010"},{"key":"e_1_2_10_9_1","doi-asserted-by":"publisher","DOI":"10.1002\/mus.21619"},{"key":"e_1_2_10_10_1","doi-asserted-by":"publisher","DOI":"10.1002\/mus.23765"},{"key":"e_1_2_10_11_1","doi-asserted-by":"publisher","DOI":"10.1002\/mus.23982"},{"key":"e_1_2_10_12_1","doi-asserted-by":"publisher","DOI":"10.1001\/archneurol.2012.1481"},{"key":"e_1_2_10_13_1","doi-asserted-by":"publisher","DOI":"10.1002\/mus.21661"},{"key":"e_1_2_10_14_1","doi-asserted-by":"publisher","DOI":"10.1002\/mus.24243"},{"key":"e_1_2_10_15_1","unstructured":"National Committee for Clinical Laboratory Standards \u201cNCCLS C24\u2010A2 Document \u201d1999 Statistical Quality Control for Quantitative Measurements: Principles and Definitions."}],"container-title":["Muscle &amp; Nerve"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/mus.28424","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,6,5]],"date-time":"2025-06-05T07:19:03Z","timestamp":1749107943000},"score":1,"resource":{"primary":{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/mus.28424"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,4,27]]},"references-count":14,"journal-issue":{"issue":"1","published-print":{"date-parts":[[2025,7]]}},"alternative-id":["10.1002\/mus.28424"],"URL":"https:\/\/doi.org\/10.1002\/mus.28424","archive":["Portico"],"relation":{},"ISSN":["0148-639X","1097-4598"],"issn-type":[{"value":"0148-639X","type":"print"},{"value":"1097-4598","type":"electronic"}],"subject":[],"published":{"date-parts":[[2025,4,27]]},"assertion":[{"value":"2025-01-05","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2025-04-20","order":2,"name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}},{"value":"2025-04-27","order":3,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}]}}