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All bones comprise an outer layer of compact bone, and an interior made up of spongy bone tissue, also called cancellous or trabecular bone. In long bones, spongy bone tissue is mainly found in the interior of the epiphyses (broad ends of the bone).
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Compact Bone01:27

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Most bones contain compact and spongy osseous tissue, but their distribution and concentration vary based on the bone's overall function.
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Bones of the Lower Limb: Tibia and Fibula01:10

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The tibia is the main weight-bearing bone of the lower leg. It is larger than the fibula with which it is paired. The tibia is also the second longest bone in the body and is located right below the skin. The proximal end of the tibia forms the medial and the lateral condyle, which articulates with the condyles of the femur to form the knee joint. Between the articulating surfaces is the irregular elevated area known as the intercondylar eminence that serves as the inferior attachment point for...
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Bones of the Lower Limb: Femur and Patella01:16

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The femur is the body's longest and strongest bone spanning the thigh region. Its head articulates with the acetabulum of the hip bone to form the hip joint. A minor indentation on the medial side of the femoral head, called the fovea capitis, serves as the site of attachment for the ligament of the head of the femur. This weak ligament spans the femur and acetabulum and supports the hip joint. The narrowed region below the head is the neck of the femur. The inclination angle between the...
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Within the skeletal system, the structure of a bone, or osseous tissue, can be exemplified in a long bone, like the femur, where there are two types of osseous tissue: cortical and cancellous.
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Intramembranous ossification is one of the two processes involved in the development of bones within an embryo. The flat bones of the face, most of the cranial bones, and the clavicles are formed via this process. During intramembranous ossification, the bones develop directly from sheets of undifferentiated mesenchymal connective tissue.
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Intrapopulation variation in lower limb trabecular architecture.

Bram Mulder1, Jay T Stock1,2,3, Jaap P P Saers1

  • 1University of Cambridge, McDonald Institute for Archaeological Research, Cambridge, UK.

American Journal of Physical Anthropology
|April 12, 2020
PubMed
Summary
This summary is machine-generated.

Trabecular bone structure varies significantly even within sedentary populations, revealing subtle behavioral differences. This highlights the need for diverse archaeological data to understand bone adaptation and sexual dimorphism.

Keywords:
bone functional adaptationintrapopulation variationlower limbsexual dimorphismtrabecular bone

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Area of Science:

  • Paleoanthropology
  • Skeletal Biology
  • Bioarchaeology

Background:

  • Trabecular structure analysis often distinguishes broad mechanical environments.
  • Intrapopulation variation in trabecular architecture related to subtle behavioral differences is understudied.
  • Understanding this variation aids in contextualizing interpopulation differences and detecting sexual dimorphism.

Observation:

  • Adult individuals from three medieval Cambridge cemeteries (hospital, parish, friary) were analyzed.
  • Trabecular architecture was quantified in the femur and tibia epiphyses using high-resolution computed tomography.
  • Parish cemetery individuals exhibited lower bone volume fraction and trabecular thickness.

Findings:

  • Significant differences in trabecular bone architecture were observed between groups from the same sedentary population.
  • Multiple sex differences were noted, but their patterns varied across anatomical regions.
  • This variability suggests site-specific functional adaptation of trabecular bone.

Implications:

  • Trabecular bone architecture can reflect subtle behavioral variations within a population.
  • Characterizing population-level structural variation requires data from multiple archaeological sites.
  • Site-specific adaptation may explain inconsistent findings of sexual dimorphism in trabecular bone structure.