Twenty-one cadaveric knees were dissected to analyze the functional an
atomy of the vastus medialis complex (VMC), which is composed of the v
astus medialis obliquus (VMO) and the vastus medialis longus (VML) mus
cles. The physiologic cross-sectional area of the VMO for 20 of the kn
ees was 29% of the total physiologic cross-sectional area for the VMC.
These values differed in one knee with a dysplastic VMO. The quantita
tive description of the VMO provided by this study will facilitate fut
ure efforts to accurately model the physiologic function of the VMO in
cadaveric investigations on patellofemoral mechanics. The effect of s
imulated pathologies and surgical reconstructions then may be determin
ed with more certainty to improve patient management.