Femoral Neck Strain During Maximal Contraction Of Isolated Hip-Spanning Muscle Groups

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    Abstract

    The aim of the study was to investigate femoral neck strain during maximal isometric contraction of the hip-spanning muscles. The musculoskeletal and the femur finite-element models from an elderly white woman were taken from earlier studies. The hip-spanning muscles were grouped by function in six hip-spanning muscle groups. The peak hip and knee moments in the model were matched to corresponding published measurements of the hip and knee moments during maximal isometric exercises about the hip and the knee in elderly participants. The femoral neck strain was calculated using full activation of the agonist muscles at fourteen physiological joint angles. The 5%±0.8% of the femoral neck volume exceeded the 90th percentile of the strain distribution across the 84 studied scenarios. Hip extensors, flexors, and abductors generated the highest tension in the proximal neck (2727 μϵ), tension (986 μϵ) and compression (-2818 μϵ) in the anterior and posterior neck, and compression (-2069 μϵ) in the distal neck, respectively. Hip extensors and flexors generated the highest neck strain per unit of joint moment (63-67 μϵ·m·N-1) at extreme hip angles. Therefore, femoral neck strain is heterogeneous and muscle contraction and posture dependent.

    Original languageEnglish
    Article number2873789
    Pages (from-to)Art: 2873789
    Number of pages11
    JournalComputational and Mathematical Methods in Medicine
    Volume2017
    DOIs
    Publication statusPublished - 2017

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