File(s) not publicly available
Quadriceps volumes are reduced in people with patellofemoral joint osteoarthritis
Objectives: This study aimed to (1) compare the volumes of vastus medialis (VM), vastus lateralis (VL), vastus intermedius and rectus femoris and the ratio of VM/VL volumes between asymptomatic controls and patellofemoral joint osteoarthritis (PFJ OA) participants; and (2) assess the relationships between cross-sectional area (CSA) and volumes of the VM and VL in individuals with and without PFJ OA. Methods: Twenty-two participants with PFJ OA and 11 controls aged ≥40 years were recruited from the community and practitioner referrals. Muscle volumes of individual quadriceps components were measured from thigh magnetic resonance (MR) images. The CSA of the VM and lateralis were measured at 10 equally distributed levels (femoral condyles to lesser femoral trochanter). Results: PFJ OA individuals had smaller normalized VM (mean difference 0.90 cm 3·kg -1, α = 0.011), VL (1.50 cm 3·kg -1, α = 0.012) and rectus femoris (0.71 cm 3·kg -1, α = 0.009) volumes than controls. No differences in the VM/VL ratio were observed. The CSA at the third level (controls) and fourth level (PFJ OA) above the femoral condyles best predicted VM volume, whereas the VL volume was best predicted by the CSA at the seventh level (controls) and sixth level (PFJ OA) above the femoral condyles. Conclusion: Reduced quadriceps muscle volume was a feature of PFJ OA. Muscle volume could be predicted from CSA measurements at specific levels in PFJ OA patients and controls. © 2012 Osteoarthritis Research Society International.
JournalOsteoarthritis and Cartilage
Pagination6p. (p. 863-868)
Rights StatementThe Author reserves all moral rights over the deposited text and must be credited if any re-use occurs. Documents deposited in OPAL are the Open Access versions of outputs published elsewhere. Changes resulting from the publishing process may therefore not be reflected in this document. The final published version may be obtained via the publisher’s DOI. Please note that additional copyright and access restrictions may apply to the published version.
Science & TechnologyLife Sciences & BiomedicineOrthopedicsRheumatologyVastus medialisVastus lateralisVastiKneePatellaArthritisMuscle sizeVASTUS MEDIALIS OBLIQUUSCROSS-SECTIONAL AREAKNEE OSTEOARTHRITISLOWER-EXTREMITYLOWER-LIMBIN-VITROMUSCLEPAINCARTILAGESTRENGTHHumansOsteoarthritis, KneeMagnetic Resonance ImagingCase-Control StudiesAgedMiddle AgedFemaleMaleQuadriceps MusclePatellofemoral JointArthritis & Rheumatology