Homo floresiensis

HOMO FLORESIENSIS

Homo floresiensis lived on the island of Flores (Indonesia) 190-50 Kya (2016SutiknaT_RobertsRG). The ancestor of this species is «suspected» to be the Asian subtype Homo erectus, which arrived from the mainland about 800 Kya (2009LyrasGA_DeVosJ). The anatomy of Homo floresiensis is less similar to Homo habilis (2008Gordon_WoodB).

Homo floresiensis Author: Cicero Moraes et al. (Arc-Team) ; source:wikimedia.org collection (license CC BY 4.0, no changes).

Among the discovered remains of a female Homo floresiensis (humanorigins.si.edu) there is a relatively well-preserved left pelvic bone (LB1/7). It has a «typically human» acetabulum (2009JungersWL_DjubiantonoT:Fig.3). The acetabulum has a complete fusion of the three bones that form it and is not hypoplastic (2012BrownP:Fig.4). The acetabular fossa is rounded and deep, continuing downwards and forwards as a wide acetabular notch. This area is the site of attachment and function of the ligamentum capitis femoris (LCF). The left femur (LB1/9) of Homo floresiensis is relatively well preserved. It is smaller than any modern human femur and is close in length to the reconstructed femur of Australopithecus afarensis (AL288-1, «Lucy»). On the head with a diameter of about 31 mm, a shallow fossa of the femoral head «for the ligamentum teres» is visualized (2009 JungersWL_DjubiantonoT). Thus, the species Homo floresiensis reliably had LCF, normally without congenital and dystrophic changes.

References

Sutikna T, Tocheri MW, Morwood MJ, Saptomo EW, Awe RD, Wasisto S, ... Roberts RG. Revised stratigraphy and chronology for Homo floresiensis at Liang Bua in Indonesia. Nature. 2016;532(7599)366-9. [researchgate.net]

Lyras GA, Dermitzakis MD, Van der Geer AAE, Van der Geer SB, De Vos J. The origin of Homo floresiensis and its relation to evolutionary processes under isolation. Anthropological Science. 2009;117(1)33-43. [jstage.jst.go.jp]

Gordon, A. D., Nevell, L., Wood, B. The Homo floresiensis cranium (LB1): Size, scaling, and early Homo affinities. Proceedings of the National Academy of Sciences. 2008;105(12)4650-5. [pmc.ncbi.nlm.nih.gov]

Brown P. LB1 and LB6 Homo floresiensis are not modern human (Homo sapiens) cretins. Journal of Human Evolution. 2012:62(2)201-24. [peterbrown-palaeoanthropology.net]

Jungers WL, Larson SG, Harcourt-Smith W, Morwood MJ, Sutikna T, Awe RD, Djubiantono T. Descriptions of the lower limb skeleton of Homo floresiensis. Journal of Human Evolution. 2009;57(5)538-54. [academia.edu]

Keywords

ligamentum capitis femoris, ligamentum teres, ligament of head of femur, doctrine, homo floresiensis

The original text in Russian is available at the link: Homo floresiensis

NB! Fair practice / use: copied for the purposes of criticism, review, comment, research and private study in accordance with Copyright Laws of the US: 17 U.S.C. §107; Copyright Law of the EU: Dir. 2001/29/EC, art.5/3a,d; Copyright Law of the RU: ГК РФ ст.1274/1.1-2,7

BLOG CONTENT

999–10 Kya

Comments

2025ArkhipovSV. Human Children

The monograph Arkhipov S.V. Human Children: The Origins of Biblical Legends from a Physician's Perspective. An essay with references to interactive materials. 2nd revised and expanded edition. Joensuu: Author's Edition, 2025. [In Russian]. The monograph dates the writing of the Book of Genesis and the events depicted in it, as well as refutes the authorship of Moses. I offer mutually beneficial cooperation (50/50) in literary translation into English or native language. Proofreading of machine translation and cooperation in editing are expected. Requirements for co-author: 1. Native speaker 2. Experience as a writer. E-mail: archipovsv(&)gmail.com Annotation The first version of the Book of Genesis appeared in Ancient Egypt approximately 3,600 years ago, during the Hyksos period. The work was conceived as a fairy tale epic. An unknown physician-encyclopedist, who is also presumed to have authored the Edwin Smith Papyrus, played a role in its composition...

ILIOTIBIAL TRACT & LCF

ILIOTIBIAL TRACT & LCF There is an opinion that the iliotibial tract, like the ligamentum capitis femoris (LCF), provides pressing of the acetabulum to the lower surface of the femoral head. I think that this is not true. The tract is located above and lateral to the center of rotation of the hip joint. Its force vector, like the force vector of the abductor group of muscles, presses the acetabulum to the upper part of the femoral head, which increases the load on it. The ligamentum capitis femoris acts in the opposite direction. Below is a diagram for a single-support position. #ligamentum_teres #hip #biomechanics #ligamentum_capitis_femoris Publication in the facebook group 04/12/2025. ...

1836WeberW_WeberE

We present fragments from the book that laid the foundation of biomechanics of the hip joint considering the ligamentum capitis femoris (LCF). The authors experimentally proved that this structure is situated in the frontal plane when the body is in a vertical position. Analysis of observations showed that when standing on one leg, the LCF and the anterior portion of the iliofemoral ligament (pars descendens lig. iliofemoralis) are stretched and hold the pelvis. These ligaments counteract the weight of the body along with the head of the femur on the same side. The insight of the Weber brothers was later developed in the works of H. von Meyer (1856) , W. Turner (1857) , and W. Savory(1874) . Weber W, Weber E. Mechanik der menschlichen Gehwerkzeuge: eine anatomisch-physiologische Untersuchung. Gottingen: Dietrichsche Buchhandlung, 1836. [fragment s ] Quote p. 128 Wir werden nämlich im folgenden Abschnitte über das Hüftgelenk nachweisen, ...

1922LeeserI

A fragment of the Book of Genesis tells about the journey of the family of Patriarch Jacob from Charan to Canaan (Gen. 31:1 – 33:20). The translation into English from of the Masoretic Hebrew text of the Torah was done by Isaac Leeser ( 1922 LeeserI ). «Most scholars agree that the texts now found in Genesis began to be written down sometime after the establishment of the monarchy in Israel in the tenth century BCE» (1992SuggsMJ_MuellerJR). A selected passage from an ancient work mentions for the first time in history the injury of the ligamentum capitis femoris (LCF) of a person is mentioned (Gen. 32:26,33). In the original Hebrew source this anatomical element is referred to as «גיד» (gheed, gid) ( Bereshit 32:33 ; 1923, 2004PreussJ; 2019ArkhipovSV_SkvortsovDV ; 2020ArkhipovSV_ProlyginaIV ). This term was recorded in writing long before Hippocrates of Kos (V-IV cent. BCE) who used the concept «νεῦρον» to designate LCF (1844LittréÉ). It is not known...

2025ArkhipovSV. Why Acetabular Labrum Repair May Be Ineffective

Original in Russian is available at the link: С.В. Архипова «Почему восстановление вертлужной губы может быть неэффективно?» (06.04.2025) , below is a machine translation edited by a non-native speaker (version dated 06/04/2025). Thematic Internet Journal About round ligament of femur April 2025 WHY ACETABULAR LABRUM REPAIR MAY BE INEFFECTIVE?: A NOTE ON THE MYSTERIOUS "DARK MATTER" OF THE HIP JOINT S.V. Arkhipov, Independent Researcher, Joensuu, Finland Abstract Acetabular labrum repair and reconstruction do not prevent hip joint instability during gait and the development of osteoarthritis in the case of an elongated ligamentum capitis femoris. This conclusion is based on mathematical calculations and analysis of experiments conducted on a mechanical hip joint model. Keywords : arthroscopy, hip joint, acetabular labrum, ligamentum capitis femoris, ligamentum teres, ligament of head of femur , reconstruction, repair Introduction Nearly 80% of primary hip ar...

ChatGPT. Scientific Review On the Article: “Why Acetabular Labrum Repair May Be Ineffective”

At our request, the language model ChatGPT, prepared to assist in the analysis and editing of texts by OpenAI, 2025, wrote a review of the article by Arkhipov SV. Why Acetabular Labrum Repair May Be Ineffective: A Note on the Mysterious ‘Dark Matter’ in the Hip Joint ([Ru] Архипов СВ . Почему восстановление вертлужной губы может быть неэффективно?: Заметка о таинственной «темной материи» в тазобедренном суставе. 06.04.2025 ). The original article was reviewed and edited based on the recommendations of Grok , an artificial intelligence developed by xAI. In accordance with the comments of both reviewers, the article was corrected and published. Below is the original text of the review by ChatGPT: Scientific Review and Critical Commentary On the article: “Why Acetabular Labrum Repair May Be Ineffective: A Note on the Mysterious ‘Dark Matter’ in the Hip Joint” Author: S.V. Arkhipov, Independent Researcher, Joensuu, Finland I. Scientific...

LCF Mechanics

Ligamentum Capitis Femoris Mechanics Announcement: A new scientific direction « Ligamentum Capitis Femoris Mechanics» has been formed. Definition: A section of physiology that develops issues of applying the doctrine of the ligamentum capitis femoris (LCF), its movements and forces to solving medical and biological problems. Synonyms: LCF Mechanics Ligamentum Capitis Femoris Mechanics Ligament of the Head of Femur Mechanics L igamentum Teres Femoris Mechanics Round Ligament of Femur Mechanics Postulates of LCF biomechanics: Strong, flexible, and non-stretchable with specific attachment points. Limits adduction, rotation, and cranial displacement of the femur. Shunts load on the femoral head and the abductor muscle group of the hip joint. Ensures rhythmicity, symmetry, and energy efficiency of walking. The foundation of Ligamentum Capitis Femoris Mechanics is laid by the work of physicians, physicists, anatomists, and physiologists over the pa...

2013ClaytonM PhiloR

Fragment from the book Clayton M, Philo R. Leonardo da Vinci: The mechanics of man (2013). The authors describe a drawing by Leonardo da Vinci depicting the insertion site of the ligamentum capitis femoris (LCF). The drawing was created in the winter of 1510-1511 in Milan while studying the anatomy of the human body ( 1510Leonardo_da Vinci ). Quote p. 90 The slightly enlarged upper head of the fibula and the blunted appearance of the styloid processes at the end of the tibia and fibula may have resulted from using freshly prepared bones, with portions of ligaments and cartilage remaining, rather than dried bones. A small piece of ligament seems to be visible on the head of the femur in the drawings below, at upper right and at upper center, and the patella drawn in isolation at upper left appears to have some of the patellar ligament remaining on its lower edge. Fragments : Leonardo da Vinci. The bones and muscles of the leg (c.1510-11) (© Royal Collection Enterprise...

Set of Classifications

General Classification of LCF Pathology Version : 20240420 Annotation Analysis of literature data and our own morphological observations allowed us to propose a General Classification of LCF Pathology. Introduction In Russia, the initial attempts to classify pathology of the ligamentum capitis femoris (LCF) were made by morphologists. L.I. Gaevskaya distinguished three types of LCF: 1) long and thick (length 41–51 mm, thickness 5 mm), 2) short and thin (length 10–20 mm, thickness 1 mm), 3) long and of small thickness (length 43–45 mm, with a thickness of 3 mm, and length 28–30 mm with a thickness of 4–5 mm) (1954 ГаевскаяЛИ ). V.V. Kovanov, A.A. Travin identified three varieties of histological structure of LCF: 1) with a predominance of loose connective tissue; 2) with a predominance of dense connective tissue; 3) with a uniform distribution of loose and dense connective tissue ( 1963 КовановВВ _ ТравинАА ). The development of arthroscopic surgery has made it possible to i...

922-722bcElohist

Excerpt from the book of Bereishit (Genesis), the lost biblical source Elohist, written in Paleo-Hebrew script. A variant of the oldest description of damage to the ligamentum capitis femoris (LCF) and the cause of lameness in Hebrew, dating from 922-722 BCE. See our commentary at the link: 922-722bcElohist [Rus]. Quote [ Paleo-Hebrew ] Elohist. Bereshit 32:32-33 (original source: 5784 Moshe Ben Amram, p. 41; our correction) Translation [Eng] Elohist. Bereshit 32:32-33 and the sun riseth on him when he hath passed over Penuel, and he is halting on his thigh; therefore the sons of Israel do not eat the sinew which shrank, which is on the hollow of the thigh, unto this day, because He came against the hollow of Jacob's thigh, against the sinew which shrank. (our correction-reconstruction of the version 1898 YoungR ( p. 23, Bereishit 32:32-33); preserved the text of the age of 922-722 BC belonging to the lost biblical source "Elohist") Moshe Ben Amram. Pentateuch in P...

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