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Related Concept Videos

Bones of the Lower Limb: Femur and Patella01:16

Bones of the Lower Limb: Femur and Patella

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 neck...
Bones of the Lower Limb: Tibia and Fibula01:10

Bones of the Lower Limb: Tibia and Fibula

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...
Classification of Bones01:18

Classification of Bones

The bones of the human skeletal system are of varied shapes, sizes, and functions. They can be classified based on their shape and function into four major classes: long bones, short bones, flat bones, and irregular bones. Some classifications include a fifth type, the sesamoid bones, as a separate class, whereas others categorize them under short bones.
Long and Short Bones
The appendicular skeleton, particularly the upper and lower limbs, is primarily made of long and short bones. The long...
Bones of the Upper Limb: Humerus01:19

Bones of the Upper Limb: Humerus

The upper limb consists of the arm, forearm, wrist, and hand bones. The humerus is the single bone of the upper arm region. Proximally, it has a large, spherical, smooth head that articulates with the glenoid cavity of the scapula to form the glenohumeral or shoulder joint. The margin of the head is the anatomical neck, a residual epiphyseal plate. Laterally it extends to form bony projections called the greater tubercle and the lesser tubercle. Next to the tubercles is the surgical neck, a...
Functional Classification of Joints01:09

Functional Classification of Joints

Functional Classification of Joints
The functional classification of joints is determined by the amount of mobility between the adjacent bones. Joints are functionally classified as a synarthrosis or immobile joint, an amphiarthrosis or slightly moveable joint, or as a diarthrosis, a freely moveable joint. Fibrous and cartilaginous joints can be functionally classified as either synarthroses  or amphiarthroses, whereas all synovial joints are classified as diarthroses.
Synarthrosis
An immobile...

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Updated: Jun 6, 2026

In Vivo Quantification of Hip Arthrokinematics during Dynamic Weight-bearing Activities using Dual Fluoroscopy
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Femur shape prediction by multiple regression based on quadric surface fitting.

V Sholukha1, T Chapman, P Salvia

  • 1Laboratory of Anatomy, Biomechanics and Organogenesis (LABO), Université Libre de Bruxelles, Belgium. vcholouk@ulb.ac.be

Journal of Biomechanics
|December 3, 2010
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Summary

This study accurately estimates femoral bone morphology using palpable anatomical landmarks, enabling in-vivo joint analysis for applications like gait studies. The method predicts 36 characteristics from just three landmarks.

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Area of Science:

  • Biomechanics and Medical Imaging
  • Orthopedic Biomechanics
  • Anatomical Landmark Analysis

Background:

  • Accurate modeling of joint surfaces is crucial for biomechanical analysis, including soft tissue wrapping and muscle moment arm evaluation.
  • Traditional methods often require detailed imaging or extensive data, limiting in-vivo applications.
  • Estimating femoral bone morphology from easily accessible anatomical landmarks presents a significant challenge and opportunity.

Purpose of the Study:

  • To develop and validate a regression-based pipeline for approximating femoral bone morphological characteristics using palpable anatomical landmarks.
  • To assess the accuracy of predicting joint centers and shape morphology from limited in-vivo data.
  • To establish a database and regression models for femoral bone characteristics.

Main Methods:

  • Data collection and storage pipeline for femoral bone characteristics.
  • Development of regression relationships using a database of morphological data.
  • In-vivo and in-vitro validation using virtual palpation from medical imaging and manual palpation on a volunteer.
  • Analysis of 36 morphological characteristics, including joint surfaces and spatial relationships.

Main Results:

  • A method was established to estimate 36 femoral morphological characteristics using only three anatomical landmarks (lateral epicondyle, medial epicondyle, greater trochanter).
  • Virtual palpation yielded satisfactory accuracy (mean distance error 2.7mm, orientation error 6.8°).
  • Manual palpation also showed good accuracy (mean distance error 4.5mm, orientation error 7.5°), with femoral head location being the least accurate estimation.

Conclusions:

  • The developed regression method allows for accurate in-vivo prediction of femoral joint shape and morphology.
  • This approach can be utilized for advanced biomechanical analyses such as surface collision, muscle wrapping, and moment arm estimation in gait analysis.
  • The findings support the use of palpable anatomical landmarks for efficient and accurate in-vivo biomechanical assessments.