Origin: The deep digital flexor muscle has three heads, originating from the lateral condyle of the fibula, the caudal and medial aspect of the tibia. Gastrocnemius muscle or as it is commonly referred to – “stomach of the leg” is a very important muscle of the body. Insertion: Via calcaneal tendon to posterior surface of calcaneus Origin: Tibia & Fibula; Insertion: On the calcaneus via the Achilles tendon; Innervation: The muscle is innervated by the nervus tibialis. Keep in mind that origin and insertion are relative terms, and can be reversed depending on the action involved. Together the Gastrocnemius, Soleus, and Plantaris are known as Triceps Surae. Soleus is used constantly in standing to maintain an upright position. Origin: Soleal line and middle third of posterior border of tibia, and upper quarter of posterior shaft of fibula. The two muscles join together at the Achilles tendon and insert on the back side of your heel bone, called the calcaneus. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Origin: Originates from the fibula. It arises from just below the knee to the heel, and is involved in standing and walking. The gastrocnemius muscles extend half-way down the lower leg, distally contributing to the Achilles tendon. Upper third of … It origination on the ilium. Lower Limb Muscles #2 Posterior Compartment of Leg (superficial) *Gastrocnemius and soleus both insert to the calcaneal (Achilles) tendon and together they form the “triceps surae”. Soleus Action. Soleus. Action: The soleus extends the ankle and allows for plantar flexion. The soleus muscle is part of the posterior compartment of the leg. The gastrocnemius muscle is used more during dynamic, higher force activities and soleus muscle is more active during postural and static contractions. Specifically, soleus originates on the soleal line of the tibia and on the head of the fibula. Soleus Origin: Fibula, medial border of tibia (soleal line) Insertion: Tendo calcaneus. The origin of the Soleus is the upper shaft of the Fibula and the medial border of the Tibia. Insertion : Semilunar crest and adjacent surface of the cartilage of the distal phalanx , continues as the deep digital flexor tendon to insert on the distal phalanx Soleus: The soleus is an efficacious muscle in the posterior part of the lower leg muscles(the calf). Flexor Hallucis Longus Origin: Fibula, posterior aspect of middle 1/3 The origin of a muscle is the point at which it originates on the skeleton. Separate the soleus from the gastrocnemius by looking inside for a division of the two muscles. Origin Of The Rectus Femoris is On The Ilium. It then fuses with the soleus tendon to form the upper part of tendocalcaneus. It is the only muscle of the group which crosses the hip joint and is a powerful knee extensor when the hip is extended but is weak when the hip is flexed. Soleus Origin And Insertion. Insertion: Top of the patella and the patella tendon to the tibial tuberosity. There is often an attachment to the oblique popliteal ligament. They are located deep to the gastrocnemius. The soleus muscle joins the plantaris and gastrocnemius muscles to insert onto the calcaneus via a common tendon – the Achilles tendon (calcaneal tendon). The soleus extends down from both bones of the lower leg (tibia & fibula) its entire length, merges into the Achilles tendon and attaches onto the posterior surface of the heel. *All 3 insert into the calcaneus, do plantar flexion and are innervated by the tibial nerve. The soleus muscle of horses is rather diminutive with respect to the overall size of adjacent synergist muscles in the hind limb of the horse. Insertion As the gastrocnemius crosses knee and ankle, the position of the knee during the plantar flexion resistance exercise affects activity of the muscle. It is named from its straight course. 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