With Irony About the Author

More than a quarter of a century ago, I asked myself the question: why do penguins and people waddle?

I studied the locomotion of people and animals, movement of machines, observed in zoos and museums, studied the structure of birds and human, experimented and analyzed, developed a mathematical apparatus. For the penguins the operation was developed: circular periacetabular osteotomy of the pelvis with rotational transposition of the proximal area of attachment of the ligament of the head of femur (ligamentum capitis femoris, ligamentum teres). A similar operation can improve the gait of some people too.

In the beginning, there was a question...

Track Music: Blue Dot Sessions, Vittoro (CC BY-NC 4.0 DEED / fragment)

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LCF in 2026 (September)

LCF in 2026 (September ) (Quotes from articles and books published in September 2026 mentioning the ligamentum capitis femoris) Goetz, J. E., Hockman, J., & Willey, M. C. (2026). Rabbit models of hip dysplasia: a narrative review. Laboratory animal research , 42 (1), 32. [i] link.springer.com Kahana-Rojkind, A. H., Strok, M. J., Walsh, E. G., Quesada-Jimenez, R., Kuhns, B. D., & Domb, B. G. (2026). Factors Associated With Return to Sport at Minimum 10-Year Follow-up in Athletes With Borderline Hip Dysplasia Undergoing Hip Arthroscopy With Capsular Plication. Orthopaedic Journal of Sports Medicine , 14 (9), 23259671261451218. [ii] journals.sagepub.com Stanard, I., Almhanna, H., Al-Mahmodi, A. M. M., Kilroy, D., & Kumar, A. H. (2026). Comparative Analysis of Vascular Density in the Femoral Head Ligament of the Dog, Sheep, and Goat. [iii] oajr.org , researchgate.net Hirt, J., Roshardt, ...

Homo neanderthalensis

HOMO NEANDERTHALENSIS Homo neanderthalensis flourished 500-30 thousand years ago in Europe and Asia. It is assumed that its ancestor could have been Homo ergaster or Homo heidelbergensis (2005KleinR). Homo sapiens neanderthalensis «Mr. N» Neanderthal Museum in Mettmann, fragment of the original photograph; source in the wikimedia.org collection (license CC BY-SA 4.0, no changes). Neanderthal, late type, the old man from La Chapelle-aux-Saints, reconstruction by M.M. Gerasimov; exposition of the Orlov Paleontological Museum (Moscow); photo by the author. A reconstruction of the pelvis of the Neanderthal "Kebara 2" (Israel), whose remains are dated to 64-59 Kya (2021AdegboyegaMT_WeaverTD), is known. The well-preserved right pelvic bone (Fig. 1) has a large acetabulum with fossa and acetabular notch, indicating the presence of ligamentum capitis femoris (LCF). Neanderthal pelvis, right acetabulum view from the lateral side (3-D model); original image on sketchfab....

Dating and authorship of the Book of Genesis

An original perspective on the dating and authorship of the Book of Genesis. This approach can reconcile all faiths, including atheists and scientists. English version of the article: https://roundligament.blogspot.com/2026/02/great-compilation-introduction.html Abstract The Book of Genesis (Bereshith) was composed in Egypt during the 17th century BCE and reached its definitive protographic form following the Minoan eruption of Thera. This study argues that the work was the result of a collaboration between an Egyptian polymath and a distinguished scribe of Asiatic descent. By analyzing ancient texts, anatomical descriptions, archaeological data, Bronze Age cultural history, and climatic markers, this article demonstrates that the book emerged from the work of a high-ranking socio-political committee within the Egyptian House of Life. We argue that the inclusion of precise anatomical data, such as the ligamentum capitis femoris, serves as a diagnostic marker of this Egypti...

18c.JoubertJ

Joubert J, painting – Jacob's struggle with God in the form of an angel (17-18th 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 was 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 ( 2024АрхиповСВ. Девятый месяц, одиннадцатый день ). Jean Joubert – Jacob's struggle with God in the form of an angel (17-18th ce...

Morphology and Histology of LCF

Version : 20240418 MORPHOLOGY OF LCF 1. Individual fibers of stroma 2. Portions of stroma 3. Bundles of stroma portions 4. Entire stroma 5. Leg (attaching part of the ligament) 6. Synovial membrane 7. Synovial fold 8. Arterial vessels 9. Venous vessels 10. Capillary bed 11. Lymphatic vessels 12. Nerves 13. Receptors 14. Adipose tissue 15. Loose connective tissue 16. Bone tissue (in the area of attachment) 17. Fibrous tissue (in the area of attachment) 18. Cartilage tissue (in the area of attachment) HISTOLOGICAL CHARACTERISTICS OF LCF ATTACHMENT SITES Bone tissue 1. Femur 2. Pelvic bone Cartilage tissue 1. Femoral head (children, edges of the fovea capitis femoris in adults) 2. Acetabular cavity (children) Fibrous tissue 1. Transverse acetabular ligament 2. Obturator membrane 3. Periosteum of the pelvic bones 4. Joint capsule Keywords: ligamentum capitis femoris, ligament of head o...

LCF in 2026 (August)

LCF in 2026 (August ) (Quotes from articles and books published in August 2026 mentioning the ligamentum capitis femoris) Maldonado, D. R., Schab, A. R., & Domb, B. G. (2026). Improvement in Patient‐Reported Outcomes, High Rate of Return to Sport, and Secondary Surgery Rate Ranging From 0% to 9.8% After Hip Arthroscopy in Dancers and Athletes in Flexibility Sports: A Systematic Review. Arthroscopy, Sports Medicine, and Rehabilitation , e70020. [i] arthroscopyjournals.onlinelibrary.wiley.com Klingele, K., & Strub, D. (2026). Author Response: Considerations and Challenges in Open Reduction With Ligamentum Teres Reconstruction for Pediatric Developmental Dysplasia of the Hip. Journal of Pediatric Orthopaedics . [ii] ovid.com Quesada‐Jimenez, R., Rana, K., Strok, M. J., Kahana‐Rojkind, A. H., Burt, A. K., Sugarman, E. P., & Domb, B. G. (2026). Dual Labral and Ligamentum Ter...

Homo ergaster

HOMO ERGASTER The Homo ergaster species lived in Africa 1.8 million years ago and was alive until 600,000 years ago, likely becoming the ancestor of Homo erectus in Asia, Homo neanderthalensis in Europe, and Homo sapiens in Africa (1995CachelS_HarrisJ; 2005KleinR). Homo ergaster is occasionally equated with Homo erectus in publications (2013TattersallI). The most complete Homo ergaster skeleton belongs to an adolescent named "Turkana Boy" (KNM-WT 15000). The young man was between 8 and 12 years old (2010GravesRR_CunninghamDL; 2019BergmanJ). The age of this individual's remains is believed to be 1.6 million years (2007TattersallI). Turkana Boy (reconstruction) Author: Mettmann Neanderthal Museum; source: wikimedia.org collection (license CC BY-SA 4.0, no changes). The pelvis of specimen KNM-WT 15000 is well preserved. It shows ossified acetabulums. In turn, they have spacious acetabular fossae and wide acetabular notches. Based on these elements, it is possible to conc...

The First Conservative Treatment

Conservative treatment of ligamentum capitis femoris (LCF) pathology is, without exaggeration, a highly complex subject. We understand how to repair LCF surgically, although we have not yet achieved significant success in this (2024). Methods of drug therapy for changes in LCF are not even discussed today. The first attempt at treating post-traumatic changes in LCF with recurrent hip dislocations was made by Galen of Pergamon (129-210/217 AD) over 19 centuries ago. In Hippocratis de articulis liber et Galeni in eum commentarius quatus (IV, 40) , he wrote: « And when mucus builds up in the joint, then the ligament [LCF] softens and weakens as a result. And it does not matter whether you call it a ligament ( σύνδεσμον ) or a connecting sinew ( νεῦρον συνδετικόν ). For those ligaments that have a rounded shape like tendons are usually called connecting sinews by anatomists. And we have already cured this kind of hip dislocation twice, and it did not dislocate again. Drying medica...

LCF in 2025 (July)

LCF in 2025 ( July ) (Quotes from articles and books published in July 2025 mentioning the ligamentum capitis femoris.) Tekcan, D., Bilgin, G., & Güven, Ş. Evaluation of Risk Factors for Developmental Dysplasia of the Hip. HAYDARPAŞA NUMUNE MEDICAL JOURNAL , 65 (2), 99-103. [i] jag.journalagent.com Domb, B. G., & Sabetian, P. W. (2025). Greater Trochanteric Pain Syndrome: Gluteal Tendinopathy, Partial Tear, Complete Tear, Iliotibial Band Syndrome, and Bursitis. In Orthopaedic Sports Medicine (pp. 1-17). Springer, Cham. [ii] link.springer.com Kuhns, B. D., Becker, N., Patel, D., Shah, P. P., & Domb, B. G. (2025). Significant Heterogeneity in Existing Literature Limits Both Indication and Outcome Comparability Between Studies Involving Periacetabular Osteotomy For Acetabular Dysplasia With or Without Arthroscopy Despite Improvement for Both: A Systematic Review. Arthroscopy . [iii] ...

1785SandifortE

Fragments from the book Sandifort E. Descriptio ossium hominis. (1785). The author briefly writes about the attachment of the ligamentum capitis femoris (LCF). Quote p. 104 [Lat] Os ischium… … Qua spectat pelvim (a) os ischion æquabile est, modice cavatum, ab exteriore profunde sinuatum (b). Sinus hic, quem acetabulum vocant, maximus, sere rotundus, est, dividique potest in partes duas, alteram semilunarem quodammodo, cartilagine tectam (c), hinc æquabilem, alteram altius excavatam, asperam (d), glandulæ muciparæ sedem præbentem, & educentem ligamentum teres, quod capiti ossis femoris infigitur (e). … Quote p. 108-109 [Lat] Femoris os … … Caput magnum, globosum, cartilagine lævi incrustatum, oblique positum (b), id est, sursum introrsumque tendens, magnitudine & figura cum acetabulo (i) congruens, intra illud admittitur, illique alligatur per ligamentum teres, quod firmiter adhæret ab altera parte acetabulo, ab altera sinui profundo, inæquabili, qui in dicto capite est (k...

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