Debate exists as to whether the oblique VMO of the vastus medialis can be activated to a greater extent than the vastus lateralis to produce preferential strengthening. This systematic review aims to determine whether preferential activation of VMO can be achieved. Debate exists as to whether the oblique VMO of the vastus medialis can be activated to a greater extent than the vastus lateralis. The vastus medialis VM muscle regulates and adjusts the extensor apparatus which influences patellofemoral function. This work was designed to study the changes caused in the activity of the oblique VMO of the vastus medialis and the VL of the vastus lateralis during sling-based exercises in patients. Abstract. This study examined the contribution of muscle fiber orientation at different knee angles to regional activation identified by high-density surface electromyography HDsEMG. Monopolar, this study aimed to investigate the electromyographic EMG activity of the vastus medialis obliquus VMO, the vastus lateralis VL and the VMO VL ratio during PNF, this muscle is unique to humans. The fibers of the muscle are mostly horizontal and therefore occupy a unique position to stabilize the patella against the femur in the. The third vastus muscle is known as the vastus medialis, sometimes called the vastus medialis oblique because of the way it sits at an angle. It is also commonly called a teardrop muscle. Weakness of the oblique VMO of the vastus medialis has been proposed to explain the high prevalence of knee pain in female subjects. Clinicians commonly use exercises to attempt to preferentially activate the VMO. Recently, our group found evidence supporting the clinical theory that the OMV is neurologically distinct from the vastus medialis, the vastus lateralis, rectus femoris, medial and lateral hamstrings were measured during maximum voluntary extension of the knee joint at speeds s, 150. The vastus medialis muscle also contributes to the proper tracking of the patella. It has been hypothesized that the vastus medialis muscle impinges into two groups of fibers, a group of fibers long and more in line with the quadriceps ligament, the vastus medialis long, and a set of fibers shorter and more obliquely oriented , the vast,