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- W2088557922 abstract "Quadriceps heads are important in biomechanical stabilization and in the pathogenesis osteoarthritis of the knee. This is the first study to explore the relative distribution of quadriceps head anatomical cross-sectional areas (ACSA) and volumes, and their response to pain and to training intervention. The relative proportions of quadriceps heads were determined in 48 Osteoarthritis Initiative participants with unilateral pain (65% women; age 45–78 years). Quadriceps head volumes were also measured in 35 untrained women (45–55 years) before and after 12-week training intervention. Cross-sectional areas of the vastus medialis (VM), inter-medius (VIM), and lateralis (VL), and of the rectus femoris (RF) were determined from axial T1-weighted MR images. The proportion of the VM on the total quadriceps ACSA increased from proximal to distal. The difference in quadriceps ACSA of painful (vs. pain-free) limbs was −5.4% for the VM (p < 0.001), −6.8% for the VL (p < 0.01), −2.8% for the VIM (p = 0.06), and +3.4% for the RF (p = 0.67) but the VM/VL ratio was not significantly altered. The muscle volume increase during training intervention was +4.2% (p < 0.05) for VM, +1.3% for VL, +2.0% for VIM (p < 0.05) and +1.6% for RF. The proportion of quadriceps head relative to total muscle ACSA and volume depends on the anatomical level studied. The results suggest that there may be a differential response of the quadriceps heads to pain-induced atrophy and to training-related hypertrophy. Studies in larger samples are needed to ascertain whether the observed differences in response to pain and training are statistically and clinically significant." @default.
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- W2088557922 date "2014-12-01" @default.
- W2088557922 modified "2023-10-11" @default.
- W2088557922 title "Relative distribution of quadriceps head anatomical cross-sectional areas and volumes—Sensitivity to pain and to training intervention" @default.
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- W2088557922 doi "https://doi.org/10.1016/j.aanat.2014.07.005" @default.
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