Human leg the femur. All four muscles unite in a common tendon inserted into the patella from where the patellar ligament extends it down to the tibial tuberosity. Fibers from the medial and lateral vasti form two retinacula that stretch past the patella on either sides down to the condyles of the tibia. The quadriceps is "the" knee extensor, but the rectus femoris additionally flexes the hip joint, and articular muscle of the knee protects the articular capsule of the knee joint from being nipped during extension. The sartorius runs superficially and obliquely down on the anterior side of the thigh, from
Soleus muscle regular movement (i.e., walking) the soleus is the primary muscle utilized for plantarflexion due to the slowtwitch fibers resisting fatigue. Due to the thick fascia covering the muscles of the leg, they are prone to compartment syndrome. This pathology relates to the inflammation of tissue affecting blood flow and compressing nerves. If left untreated compartment syndrome can lead to atrophy of muscles, blood clots, and neuropathy. Soleus muscle In humans and some other mammals, the soleus is a powerful muscle in the back part of the lower leg (the calf). It runs from just below the knee to the heel,