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Whilst widely accepted that the proximal rectus femoris muscle has two distinct tendon slips, the authors in 2006 described a third separate tendon slip arising from the anterior femoral capsule and this has been widely termed the \u2018capsular head\u2019. We provide evidence that imaging features corroborate this revised anatomical concept. Whilst the clinical relevance of these findings is yet to be established, it remains important that our understanding of the radiological anatomy in this area advances with the forward growth of imaging clarity. In this review, we revisit anatomical concepts and present atypical injury cases that may be explained by the presence of a separate capsular head.<\/jats:p>","DOI":"10.1259\/bjr.20220278","type":"journal-article","created":{"date-parts":[[2022,6,15]],"date-time":"2022-06-15T16:37:08Z","timestamp":1655311028000},"source":"Crossref","is-referenced-by-count":9,"title":["The capsular head of the proximal rectus femoris muscle: a review of the imaging anatomy of proximal muscle injury in professional athletes \u2013 early experience"],"prefix":"10.1093","volume":"95","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4842-4120","authenticated-orcid":false,"given":"Thomas","family":"Armstrong","sequence":"first","affiliation":[{"name":"Department of Musculoskeletal Radiology, Chapel Allerton Hospital, Leeds Teaching Hospitals NHS Trust , Leeds , 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