{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,8,28]],"date-time":"2025-08-28T12:16:19Z","timestamp":1756383379168,"version":"3.44.0"},"reference-count":26,"publisher":"BMJ","content-domain":{"domain":["bmj.com"],"crossmark-restriction":true},"short-container-title":["BMJ Case Reports"],"accepted":{"date-parts":[[2016,12,23]]},"abstract":"<jats:p>A 43-year-old man presented with weakness of the interphalageal joint of his right thumb following the use of forearm crutches. On examination he was unable to oppose his thumb and index finger to form the \u2018ok\u2019 sign. Nerve conduction showed anterior interosseous nerve (AIN) damage along its path to the flexor pollicis longus. The patient was managed conservatively with little clinical improvement seen at 4\u2005months. AIN palsies are very rare and account for &lt;1% of all upper limb lesions. Although AIN palsies resulting from other causes such as surgery and blunt trauma are more common, we report the second case of AIN palsy following crutch use, and the first case in which clinical identification was confirmed using electrodiagnosis. Usual clinical practice recommends a prolonged period of conservative management with surgical management withheld for a minimum of 12\u2005months. Correct crutch fitting and early identification of signs of associated injuries are of paramount importance.<\/jats:p>","DOI":"10.1136\/bcr-2016-218240","type":"journal-article","created":{"date-parts":[[2017,1,11]],"date-time":"2017-01-11T11:05:27Z","timestamp":1484132727000},"page":"bcr2016218240","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":2,"title":["Persistent anterior interosseous nerve palsy following forearm crutch use"],"prefix":"10.1136","volume":"2017","author":[{"given":"Peter","family":"Macneal","sequence":"first","affiliation":[{"name":"King's College London, London, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Christopher Robert","family":"Crome","sequence":"additional","affiliation":[{"name":"Department of Trauma & Orthopaedic Surgery, Queen Elizabeth University Hospital, West of Scotland, Glasgow, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Scarlett","family":"McNally","sequence":"additional","affiliation":[{"name":"Department of Orthopaedics, Eastbourne D.G.H, Eastbourne, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[2017,1,11]]},"reference":[{"key":"2025082804332273000_2017.jan11_1.bcr2016218240.1","doi-asserted-by":"publisher","DOI":"10.1007\/BF00450231"},{"key":"2025082804332273000_2017.jan11_1.bcr2016218240.2","doi-asserted-by":"crossref","first-page":"1561","DOI":"10.1007\/s00402-011-1322-5","article-title":"Anterior interosseous nerve syndrome: retrospective analysis of 14 patients","volume":"131","author":"Ulrich","year":"2011","journal-title":"Arch Orthop Trauma Surg"},{"key":"2025082804332273000_2017.jan11_1.bcr2016218240.3","doi-asserted-by":"publisher","DOI":"10.5435\/JAAOS-21-05-268"},{"key":"2025082804332273000_2017.jan11_1.bcr2016218240.4","first-page":"467","article-title":"Flexor pollicis longus muscle: its morphology and clinical significance","volume":"42-A","author":"Magini","year":"1906","journal-title":"J Bone Jt Surg"},{"key":"2025082804332273000_2017.jan11_1.bcr2016218240.5","doi-asserted-by":"crossref","unstructured":"Wu F , Cantab MA , Ismaeel A , et al . 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