Australopithecus Gait

In our opinion, the ligamentum teres or ligamentum capitis femoris (LCF) in Australopithecus afarensis determined the gait. Its pelvis moved in the frontal plane similar to that of a modern human. In the horizontal plane, the rotational movements of the Australopithecus pelvis were carried out with a significantly smaller amplitude. Presumably Australopithecus afarensis had relatively shorter steps than Homo sapiens. During walking, the shoulder girdle was positioned in the frontal plane, and the arms exhibited minimal oscillation in the sagittal plane.

Illustration:

Comparative analysis of LCF movements
On the right is the acetabulum of Homo sapiens (photo by the author); on the left is the acetabulum of Australopithecus afarensis 3D model of the pelvis (fragment of a screenshot from sketchfab.com); The distal end of the LCF (ligamentum teres) in Australopithecus moved in the horizontal plane in the acetabulum fossa with a smaller amplitude than in modern humans.

keywords: ligamentum capitis femoris, ligament of head of femur, ligamentum teres, anatomy, paleontology, gait, australopithecus

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THEORY AND HYPOTHESES

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LCF in 2025 (December)

LCF in 2025 ( December) (Quotes from articles and books published in December 2025 mentioning the ligamentum capitis femoris) Sarassa, C., Aristizabal, S., Mejía, R., García, J. J., Quintero, D., & Herrera, A. M. (2025). Intraosseous Tunneling and Ligamentum Teres Ligamentodesis “Teretization” to Enhance Stability in Congenital Hip Dislocation Surgery: Surgical Technique and Mid-Term Outcomes. Journal of Pediatric Orthopaedics , 10-1097. [i] journals.lww.com Kampouridis, P., Svorligkou, G., Spassov, N., & Böhme, M. (2025). Postcranial anatomy of the Late Miocene Eurasian hornless rhinocerotid Chilotherium. PLoS One , 20 (12), e0336590. [ii] journals.plos.org Burdette, T. N., Hsiou, C. L., McDonough, S. P., Pell, S., Ayers, J., Divers, T. J., & Delvescovo, B. Sidewinder syndrome associated with complete rupture of the ligamentum capitis ossis femoris in a horse. Eq...

IMPROVING POSTOPERATIVE COMFORT...

Improving Postoperative Comfort and Increasing the Reliability of Hip Prostheses by Supplementing with Artificial Ligaments: Proof of Concept and Prototype Demonstration S.V. Arkhipov, Independent Researcher, Joensuu, Finland CONTENT [i] Abstract [ii] Introduction [iii] Materials and Methods [iv] Results and Discussion [v] Static Tests [vi] Dynamic Tests [vii] Prototype Fabrication and Testing [viii] Conclusion [ix] References [x] Application [i] Abstract The principle of operation of an experimental total hip endoprosthesis augmented with ligament analogs has been demonstrated in single-leg vertical stances and at the mid-stance phase of the single-support period of gait. The experiments were conducted on a specially designed mechatronic testing rig. The concept of the important role of the ligamentous apparatus is further illustrated by a set of demonstrative mechanical models. The...

1883SuttonJB

According to the author, the ligamentum capitis femoris (LCF) is a tendon of the pectineus muscle, separated from it in consequence of skeletal modifications. THE LIGAMENTUM TERES By J. B. SUTTON, Demonstrator of Anatomy, Middlesex Hospital. (PLATE VIII.) The round ligament of the coxo-femoral articulation has long been an anatomical puzzle, consequently many diverse notions exist concerning it. Some anatomists ascribe to this hollow band of fibrous tissue very important functions in the mechanism of the hip-joint; others deprive it of all glory, simply assigning to it the menial duty of conveying blood-vessels to the head of the femur. Certain authors content themselves with a brief description of its attachments; others give elaborate and detailed accounts, extending over several pages, of its anatomy and supposed function. My object in the present communication is to show that this singular ligament is nothing more than the tendon of the pectineus muscle, sepa...

2012FrederickP_KelmanDC

Invention (Patent): Frederick P, Belew K, Jasper L, Gatewood J, Gibson L, Masonis J, Cooper M, Kelman DC. Methods and apparatus for FAI surgeries. US20120283840A1 (2012). US20120283840A1 US Inventors: Phillip Frederick, Kevin Belew, Lauren Jasper, James Gatewood, Luke Gibson, John Masonis, Michael Cooper, David C. Kelman Current Assignee: Smith and Nephew Inc Worldwide applications 2010 KR JP RU BR CA US CN EP CN WO AU 2014 US 2016 AU 2017 AU Application US13/202,612 events: 2010-02-25 Заявка подана Smith and Nephew Inc 2010-02-25 Приоритет US13/202,612 2012-11-08 Публикация US20120283840A1 2014-12-02 Заявка удовлетворена 2014-12-02 Публикация US8900320B2 Статус: Активный 2031-06-08 Измененный срок действия Methods and apparatus for FAI surgeries Phillip Frederick, Kevin Belew, Lauren Jasper, James Gatewood, Luke Gibson, John Masonis, Michael Cooper, David C. Kelman Abstract A partial rim implant for an acetabulum in a pelvic bone comprise...

163-192Galen

Fragment from the treatise Galen. On anatomical procedures (Περὶ Ἀνατομικῶν Ἐγχειρήσεων, ca. 163-192). The author writes about the high resiliency and hardness of ligamentum capitis femoris (LCF), and also notes its connective function. See our commentary at the link: 163-192Galen [Rus], and 2020ArkhipovSV_ProlyginaIV . Quote [Grc] Περὶ Ἀνατομικῶν Ἐγχειρήσεων. Βιβλιον B. K εφ . ι ʹ . Αλλά χρή σε, καθάπερ επί της χειρός επεσκέψω τους συνδέσμους των οστών, ούτω και νυν επισκέψασθαι πασών των γεγυμνωμένων διαρθρώσεων, πρώτης μεν της κατ' ισχίον, εχούσης ένα μεν εν κύκλω σύνδεσμον, απάντων των άρθρων κοινόν, (ουδέν γάρ έστιν, ότω μή περιβέβληται τοιούτος σύνδεσμος,) έτερον δε τον διά του βάθους εν τη διαρθρώσει κατακεκρυμμένον, ος συνάπτει την κεφαλήν του μηρού τη κατ' ισχίον κοιλότητι, πάνυ σκληρός ών, ώς ήδη δύνασθαι λέγεσθαι νεύρον χονδρώδες. (original source: 1821KühnCG, pp. 328-329) [Lat] De Anatomicis Administrationibus. Liber II. Cap. X. Verum considerare te convenit, ut i...

INFERIOR PORTAL FOR HIP ARTHROSCOPY

Combined PDF version of the article: Arkhipov SV. Arkhipov SV. Inferior Portal for Hip A rthroscopy: A Pilot Experimental Study. This page contains a photocopy of the publication. The links for downloading the PDF version and the addresses of the online versions are given below. The original in Russian is available at the link: Нижний портал для артроскопии тазобедренного сустава .

LCF in 2025 (June)

LCF in 2025 ( June ) (Quotes from articles and books published in June 2025 mentioning the ligamentum capitis femoris) Kuhns, B. D., Kahana-Rojkind, A. H., Quesada-Jimenez, R., McCarroll, T. R., Kingham, Y. E., Strok, M. J., ... & Domb, B. G. (2025). Evaluating a semiquantitative magnetic resonance imaging-based scoring system to predict hip preservation or arthroplasty in patients with an intact preoperative joint space. Journal of Hip Preservation Surgery , hnaf027. [i] academic.oup.com Iglesias, C. J. B., García, B. E. C., & Valarezo, J. P. P. (2025) CONTROLLED GANZ DISLOCATION. EPRA International Journal of Multidisciplinary Research (IJMR) - Peer Reviewed Journal. 11(5)1410-13. DOI: 10.36713/epra2013 [ii] researchgate.net Guimarães, J. B., Arruda, P. H., Cerezal, L., Ratti, M. A., Cruz, I. A., Morimoto, L. R., ... & Ormond Filho, A. G. (2025). Hip Microins...

NEWS 2026

New publications of our resource in 2026 January 03, 2026 2025SarassaC_HerreraAM The article describes a technique for fixing the femoral head using the LCF in congenital hip dislocation. 2025EnglertG_KlingeleK The article describes the LCF reconstruction through the femoral tunnel for hip dysplasia. 2023AbibeRB_SaundersWB The article describes experimental reconstruction of ligamentum capitis femoris (LCF) in rabbits. January 02, 2026 Q uotes This section has b een created. January 01, 2026 LCF in 2025 (December) Q uotes from articles and b ooks published in December 2025 mentioning the LCF. 1946SpychalskiJ Painting, Drawing depicting the circumstances and mechanism of the LCF injury. 1975BorsosM Painting, Drawing depicting the circumstances and mechanism of the LCF injury. 13c.Soligalich Icon, Draw ing depicting the circumstances and mechanism of the LCF injury. ( section started Ja...

13c.Soligalich

Soligalich , icon, Jacob wrestling with the angel ( 13 cent. ). Depicting the circumstances and mechanism of the ligamentum capitis femoris (LCF) injury based on the description in the Book of Genesis: 25 And Ja cob wa s left alone; and there wrestled a man with him until the breaking of the day. 26 And when he saw that he could not pre vail against him, he struck against the hollow of his thigh ; and the hollow of Jacob's thigh was put out of joint, as he was wrestling with him. … 33 Therefore do the children of Israel not eat the sinew which shrank, which is upon the hollow of the thigh, unto this day; because he struck against the hollow of Jacob's thigh on the sinew that shrank. ( 1922LeeserI , Genesis (Bereshit) 32:25-26,33) More about the plot in our work: Ninth month, eleventh day ( 2024 АрхиповСВ. Девятый месяц, одиннадцатый день ). Soligalich – Jacob Wrestling with the Angel ( 13 cent. ); original in the leonovval...

LCF in 2024 (June)

LCF in 2024 ( June ) Publications about the LCF 2024 . Ariyaratne, S., Nischal, N., Patel, A., Botchu, R., Davies, A.M. (2024). Tumors and Tumor-like Lesions. ( pp. 1–39) . In: Medical Radiology. Springer, Berlin, Heidelberg. [i] link.springer.com Alrashdi, N., Motl, R., Aguiar, E., Lein Jr, D., Perumean-Chaney, S., Ryan, M., & Ithurburn, M. (2024). Pre-and Post-Operative Pain Intensity and Physical Activity Levels in Individuals with Acetabular Dysplasia Undergoing Periacetabular Osteotomy: A Prospective Cohort Study. International Journal of Sports Physical Therapy , 19(6), 692. [ii] ijspt.scholasticahq.com Powell, J., Kent, T., & Hanson, C. (2024). Dysfunction, Evaluation, Diagnosis, and Treatment of the Hip Complex: Nonsurgical and Surgical. In: Wallmann, H., & Donatelli, R. (Ed). Foundations of Orthopedic Physical Therapy. Taylor & Francis, 211-236. [iii] books.google SEN., E., SEVER, S. N., TURHAN, B., CİRAK, M. T., & GOL...

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