Soleus muscle

Muscles of lower extremity

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.

Right leg seen from behind.
Animation
Nerves, arteries and veins surrounding the gastrocnemius and soleus.
Muscle layer under the gastrocnemius
Cross section of the lower leg, showing the gastrocnemius at the back.
Gastrocnemius muscle (dissection)
Location of muscle

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

Triceps surae muscle

Posterior view of the triceps surae.
Animation. Gastrocnemius and Soleus are shown in different colors.
Illustration of the gastrocnemius.
Illustration of soleus.
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.

A human heel
Sagittal section through the foot
From above

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.

Position of fibula in human body (shown in red)
3D Medical Animation still shot of Fibula structure
Position of fibula (shown in red)
Shape of fibula (right)
Diagram which depicts ossification of human fibula.
Lower extremity of right fibula. Medial aspect.
Ankle joint. Deep dissection.
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.

The calcaneus forms the bony part of the heel. It forms a joint with the talus bone, the subtalar joint.
Calcaneus fracture X-ray
Left calcaneus. Animation.
Bones of foot
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.

Position of tibia (shown in red)
Upper surface of right tibia. (Anterior is at top.)
Knee
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.
Shape of right tibia
Longitudinal section of tibia showing interior
Right knee-joint. Anterior view.
Right knee joint from the front, showing interior ligaments
Left knee joint from behind, showing interior ligaments
Left talocrural joint
Coronal section through right talocrural and talocalcaneal joints
Dorsum of Foot. Ankle joint. Deep dissection
Dorsum of Foot. Ankle joint. Deep dissection
Ankle joint. Deep dissection. Anterior view
Bones of the right leg. Posterior surface
Dorsum of Foot. Ankle joint. Deep dissection.
Ankle joint. Deep dissection.
Ankle joint. Deep dissection.
Ankle joint. Deep dissection.
Ankle joint. Deep dissection.

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 or calcaneal tendon is attached to the gastrocnemius and soleus muscles.
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.
Achilles tendon at foetus

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

Tibial nerve

Branch of the sciatic nerve.

Plan of sacral and pudendal plexuses (Tibial nerve labelled at centre left)
Tibial 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)
Tibial nerve
Tibial nerve
Tibial nerve

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.

Plantaris muscle. Seen from behind.
Animation
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 muscle
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.