Gastrocnemius

gastroc-muscle-lateral-labeledMuscle Origin

Lateral and medial condyles of femur to calcaneus through Achilles tendon.

Medial head: the depression at the upper and posterior part of the medial condyle of the femur and continuing behind the adductor tubercle to a slightly raised area on the popliteal surface of the femur, just above the medial condyle.
Lateral head: area on the lateral surface of the lateral condyle of the femur and to the lower part of the corresponding supracondylar line. The Wellness Digest

Insertion

Tendo calcaneus (achilles tendon) into mid-posterior calcaneus.

Receives the tendon of soleus on its deep surface to form the Achilles tendon to attach to the middle of three facets on the posterior surface of the calcaneus.

Action

Plantar flexes foot at ankle joint.

Plantarflexion of the foot at the ankle, assists with flexion of the leg at the knee.

Innervation – Nerve control

Tibial nerve from the sciatic, specifically, nerve roots S1–S2.

Artery

Sural arteries.

The sural arteries (inferior muscular arteries) are two large branches, which are distributed to the gastrocnemius, soleus, and plantaris muscles. The term applies to any of four or five arteries arising from the popliteal artery, with distribution to the muscles and integument of the calf, and with anastomoses to the posterior tibial, medial and lateral inferior genicular arteries. Wiki

Antagonist muscles

Tibialis anterior muscle.

In human anatomy, the tibialis anterior is a muscle that originates in the upper two-thirds of the lateral (outside) surface of the tibia and inserts into the medial cuneiform and first metatarsal bones of the foot. It acts to dorsiflex and invert the foot. This muscle is mostly located near the shin. Wiki

Pictures of muscles

 

Trigger Point Referrals

 

Stretching description

 

Exercises

 

Injuries

 

Treatment

 

Additional Resources
Sports Lab
Wiki
American Academy of Manual Medicine
Innerbody

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