Soleus muscle

Powerful muscle in the back part of the lower leg .

- Soleus muscle

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Gastrocnemius muscle

Superficial two-headed muscle that is in the back part of the lower leg of humans.

Nerves, arteries and veins surrounding the gastrocnemius and soleus.

Cross section of the lower leg, showing the gastrocnemius at the back.

The gastrocnemius is located with the soleus in the posterior (back) compartment of the leg.

Triceps surae muscle

Animation. Gastrocnemius and Soleus are shown in different colors.

Nerves, arteries and veins surround the gastrocnemius and soleus.

Cross section of the lower leg, with triceps surae at back (soleus and gastrocnemius)

Nerves and blood-vessels overlying the triceps surae

Photograph of the gastrocnemius-soleus junction.

The triceps surae consists of two muscles located at the calf – the two-headed gastrocnemius and the soleus.

Heel

Prominence at the posterior end of the foot.

The Achilles tendon is the muscle tendon of the triceps surae, a "three-headed" group of muscles—the soleus and the two heads of the gastrocnemius.

Calf (leg)

Back portion of the lower leg in human anatomy.

The calf is the back portion of the lower leg

The calf is composed of the muscles of the posterior compartment of the leg: The gastrocnemius and soleus (composing the triceps surae muscle) and the tibialis posterior.

Fibula

Leg bone on the lateral side of the tibia, to which it is connected above and below.

3D Medical Animation still shot of Fibula structure

Diagram which depicts ossification of human fibula.

Lower extremity of right fibula. Medial aspect.

Knee and tibiofibular joint. Deep dissection. Anterior view.

It presents in front a tubercle for the origin of the upper and anterior fibers of the peroneus longus, and a surface for the attachment of the anterior ligament of the head; and behind, another tubercle, for the attachment of the posterior ligament of the head and the origin of the upper fibers of the soleus.

Calcaneus

Bone of the tarsus of the foot which constitutes the heel.

$Calcaneus fracture X-ray$

3D rendering of a left calcaneus derived from CT scan data. The calcaneus is white, and the other bones of the foot and ankle are clear to illustrate the position and relationship of the calcaneus to the other tarsal bones.

Three muscles insert on the calcaneus: the gastrocnemius, soleus, and plantaris.

Tibia

Larger, stronger, and anterior of the two bones in the leg below the knee in vertebrates (the other being the fibula, behind and to the outside of the tibia), and it connects the knee with the ankle bones.

Upper surface of right tibia. (Anterior is at top.)

Bones of the right leg. Anterior surface

Lower extremity of right tibia seen from the front

Lower extremity of right tibia seen from the back

Plan of ossification of the tibia. From three centers.

Epiphysial lines of tibia and fibula in a young adult. Anterior aspect.

Longitudinal section of tibia showing interior

Right knee joint from the front, showing interior ligaments

Left knee joint from behind, showing interior ligaments

Coronal section through right talocrural and talocalcaneal joints

Dorsum of Foot. Ankle joint. Deep dissection

Ankle joint. Deep dissection. Anterior view

Bones of the right leg. Posterior surface

The medial border is smooth and rounded above and below, but more prominent in the center; it begins at the back part of the medial condyle, and ends at the posterior border of the medial malleolus; its upper part gives attachment to the tibial collateral ligament of the knee-joint to the extent of about 5 cm., and insertion to some fibers of the popliteus muscle; from its middle third some fibers of the soleus and flexor digitorum longus muscles take origin.

Achilles tendon

Tendon at the back of the lower leg, and is the thickest in the human body.

The achilles tendon, tendo calcaneus attaches distally to the calcaneual tuberosity, and arises superiorly from the triceps surae complex of the gastrocnemius and soleus muscles.

It serves to attach the plantaris, gastrocnemius (calf) and soleus muscles to the calcaneus (heel) bone.

Tibial nerve

Branch of the sciatic nerve.

Cross-section through middle of left calf

Cutaneous nerves of the right lower extremity. Front and posterior views

Diagram of the segmental distribution of the cutaneous nerves of the sole of the foot

A schematic of the sacral plexus with the origin of the tibial nerve shown (labeled at the bottom left)

Muscular branches - Muscular branches arise from the distal part of the popliteal fossa. It supplies the medial and lateral heads of gastrocnemius, soleus, plantaris and popliteus muscles. Nerve to popliteus crosses the popliteus muscle, runs downwards and laterally, winds around the lower border of the popliteus to supply the deep (or anterior) surface of the popliteus. This nerve also supplies the tibialis posterior muscle, superior tibiofibular joint, tibia bone, interosseous membrane of leg, and the inferior tibiofibular joint.

Plantaris muscle

One of the superficial muscles of the superficial posterior compartment of the leg, one of the fascial compartments of the leg.

The plantaris is visible under the gastrocnemius.

The synovial sheaths of the tendons around the ankle. Medial aspect. (Tendon of Plantaris labeled at bottom right.)

Muscles of the back of the leg. Superficial layer.

Cross-section through middle of leg. Tendon of plantaris is located between soleus and gastrocnemius.

Plantaris tendon runs between soleus and gastrocnemius. Plantaris tendon is indicated by white arrow-heads.

It is one of the plantar flexors in the posterior compartment of the leg, along with the gastrocnemius and soleus muscles.