{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,11]],"date-time":"2026-09-11T19:51:42Z","timestamp":1789156302589,"version":"build-2803163510"},"reference-count":21,"publisher":"SAGE Publications","issue":"4","license":[{"start":{"date-parts":[[1995,7,1]],"date-time":"1995-07-01T00:00:00Z","timestamp":804556800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Am J Sports Med"],"published-print":{"date-parts":[[1995,7]]},"abstract":"<jats:p>We performed cadaveric dissection of the rectus femo ris muscle to correlate the various lesions of strain injury seen with imaging studies to the muscular anatomy. The proximal tendon is composed of a superficial, an terior portion from the direct head, and a deep intra muscular portion from the indirect head. The muscle fibers arising from the anterior superficial tendon of the direct head travel in a posterior and distal direction to insert on the posterior tendon of insertion, giving the proximal muscle a unipennate architecture. Muscle fi bers from the intramuscular tendon of the indirect head originate on both the medial and lateral sides of the tendon and insert on the distal posterior tendon to cre ate its bipennate structure. Three chronic strain injuries involving the midmuscle belly substance were explored grossly and microscopically. It appears that one type of acute strain injury occurs in the midmuscle belly with disruption of the muscle-tendon junction of the intra muscular tendon resulting in local hemorrhage and edema. More chronically, this hematoma organizes into a fatty, loose connective tissue encasement of the deep intramuscular proximal tendon. Serous fluid from the hematoma may remain within the connective tissue sheath, creating a pseudocyst with the deep intra muscular tendon of the indirect head at its center. The muscle's anatomy helps to explain a different rectus femoris strain injury.<\/jats:p>","DOI":"10.1177\/036354659502300421","type":"journal-article","created":{"date-parts":[[2007,6,21]],"date-time":"2007-06-21T20:46:52Z","timestamp":1182458812000},"page":"493-499","source":"Crossref","is-referenced-by-count":188,"title":["An Explanation for Various Rectus Femoris Strain Injuries Using Previously Undescribed Muscle Architecture"],"prefix":"10.1177","volume":"23","author":[{"given":"Carl T.","family":"Hasselman","sequence":"first","affiliation":[{"name":"Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Thomas M.","family":"Best","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"suffix":"IV","given":"Charles","family":"Hughes","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Salutario","family":"Martinez","sequence":"additional","affiliation":[{"name":"Department of Radiology, Duke University Medical Center, Durham, North Carolina"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"suffix":"Jr.","given":"William E.","family":"Garrett","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[1995,7,1]]},"reference":[{"key":"atypb1","unstructured":"Baudrillard JC , Lerais JM, Segal P., et al: Enthesopathie de l'Insertion Haute du Droit Anterieur J Radiol 67 185-191, 1986"},{"key":"atypb2","doi-asserted-by":"publisher","DOI":"10.1097\/00005373-198606000-00010"},{"key":"atypb3","unstructured":"Comtet JJ, Genety J., Brunet B., et al Traitement Chirurgical des Ruptures du Droit Anterieur (rectus femoris) Chez le Sportif Nouv Presse Med 7(27) 2387-2390, 1978"},{"key":"atypb4","doi-asserted-by":"publisher","DOI":"10.1007\/BF00191673"},{"key":"atypb5","doi-asserted-by":"crossref","unstructured":"Fleckenstein JL, Shellock FG Exertional muscle injuries Magnetic resonance imaging evaluation Top Magn Reson Imaging 3(4): 50-70, 1991","DOI":"10.1097\/00002142-199109000-00006"},{"key":"atypb6","doi-asserted-by":"publisher","DOI":"10.1148\/radiology.172.3.2772190"},{"key":"atypb7","doi-asserted-by":"publisher","DOI":"10.1177\/036354658401200202"},{"key":"atypb8","doi-asserted-by":"publisher","DOI":"10.1249\/00005768-198910000-00004"},{"key":"atypb9","doi-asserted-by":"publisher","DOI":"10.1177\/036354658701500504"},{"key":"atypb10","unstructured":"Gerard Y., Jacob M., Lamarque B., et al Les Ruptures du Droit Anterieur en Pratique Sportive Reunion Annuelle 53 85-87, 1978"},{"key":"atypb11","doi-asserted-by":"publisher","DOI":"10.1097\/00004728-199111000-00017"},{"key":"atypb12","doi-asserted-by":"publisher","DOI":"10.1177\/036354659502300111"},{"key":"atypb13","doi-asserted-by":"publisher","DOI":"10.1016\/0022-510X(73)90023-3"},{"key":"atypb14","doi-asserted-by":"crossref","unstructured":"Mink JH, Deutsch AL, Kerr R. 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