title: Asymmetry and structural system analysis of the proximal femur meta-epiphysis: osteoarticular anatomical pathology.
abstract: BACKGROUND
  The human femur is commonly considered as a subsystem of the locomotor apparatus with four conspicuous levels of organization. This phenomenon is the result of the evolution of the locomotor apparatus, which encompasses both constitutional and individual variability. The work therein reported, therefore, underlies the significance of observing anatomical system analysis of the proximal femur meta-epiphysis in normal conditions, according to the anatomic positioning with respect to the right or left side of the body, and the presence of system asymmetry in the meta-epiphysis structure, thus indicating structural and functional asymmetry.
  
  
  METHODS
  A total of 160 femur bones of both sexes were compiled and a morphological study of 15 linear and angulated parameters of proximal femur epiphysis was produced, thus defining the linear/angulated size of tubular bones. The parameters were divided into linear and angulated groups, while maintaining the motion of the hip joint and transmission of stress to the unwanted parts of the limb. Furthermore, the straight and vertical diameters of the femoral head and the length of the femoral neck were also studied. The angle between the neck and diaphysis, the neck antiversion and angle of rotation of the femoral neck were subsequently measured. Finally, the condylo-diaphyseal angle with respect to the axis of extremity was determined. To visualize the force of intersystem ties, we have used the method of correlation galaxy construction.
  
  
  RESULTS
  The absolute numeral values of each linear parameter were transformed to relative values. The values of superfluidity coefficient for each parameter in the right and left femoral bone groups were estimated and Pearson's correlation coefficient has been calculated (> 0.60). Retrospectively, the observed results have confirmed the presence of functional asymmetry in the proximal femur meta-epiphysis. On the basis of compliance or insignificant difference in the confidence interval of the linear parameters, we have revealed, therefore, a discrepancy in values between the neck and the diaphysis angle and the angle of femoral neck rotation (range displacement of confident interval to a greater degree to the right).
  
  
  CONCLUSIONS
  This study assessed the observations of a systemic anatomical study encompassing the proximal femur meta-epiphysis behavior in normal condition. This work has significance in medical practice as the theoretical basis is also required in knowing the decreased frequency and degree of severity of osteoarthritic pathologies in the dominant lower extremity.
authors.affiliation: Cellular and Molecular Signaling Research Group, Departments of Biological and Biomedical Sciences, Faculty of Arts and Sciences, Lebanese International University, Beirut, Lebanon.
authors.forename: Ali A
authors.initials: AA
authors.lastname: Samaha
authors.forename: Alexander V
authors.initials: AV
authors.lastname: Ivanov
authors.forename: John J
authors.initials: JJ
authors.lastname: Haddad
authors.forename: Alexander I
authors.initials: AI
authors.lastname: Kolesnik
authors.forename: Safaa
authors.initials: S
authors.lastname: Baydoun
authors.forename: Maher R
authors.initials: MR
authors.lastname: Arabi
authors.forename: Irena N
authors.initials: IN
authors.lastname: Yashina
authors.forename: Rana A
authors.initials: RA
authors.lastname: Samaha
authors.forename: Dimetry A
authors.initials: DA
authors.lastname: Ivanov