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The Achilles tendon or heel cord, also known as the calcaneal tendon, is a tendon at the back of the lower leg, and is the thickest in the human body. [1][2][3][4][5][6][excessive citations] It serves to attach the plantaris, gastrocnemius (calf) and soleus muscles to the calcaneus (heel) bone. These muscles, acting via the tendon, cause ...
Soleus muscles have more slow muscle fibers than many other muscles. In some animals, such as the guinea pig and cat, soleus consists of 100% slow muscle fibers. [6] [7] Human soleus fiber composition is variable, containing between 60% and 100% slow fibers. [8] The soleus is the most effective muscle for plantarflexion in a bent knee position.
Gastrocnemius muscle. Right leg seen from behind. The gastrocnemius muscle (plural gastrocnemii) is a superficial two-headed muscle that is in the back part of the lower leg of humans. It is located superficial to the soleus in the posterior (back) compartment of the leg. It runs from its two heads just above the knee to the heel, extending ...
Achilles tendinitis. Achilles tendinitis, also known as Achilles tendinopathy, is soreness the Achilles tendon. It is accompanied by alterations in the tendon's structure and mechanical properties. [2] The most common symptoms are pain and swelling around the back of the ankle. [1] The pain is typically worse at the start of exercise and ...
51062. Anatomical terms of muscle. [ edit on Wikidata] The triceps surae consists of two muscles located at the calf – the two-headed gastrocnemius and the soleus. These muscles both insert into the calcaneus, the bone of the heel of the human foot, and form the major part of the muscle of the posterior leg, commonly known as the calf muscle.
Appearance. The ankle jerk reflex, also known as the Achilles reflex, occurs when the Achilles tendon is tapped while the foot is dorsiflexed. It is a type of stretch reflex that tests the function of the gastrocnemius muscle and the nerve that supplies it. A positive result would be the jerking of the foot towards its plantar surface.
The main symptom of an Achilles tendon rupture is the sudden onset of sharp pain in the heel. Additionally, a snap or "pop" may be heard as the tendon breaks. Some people describe the pain as a hit or kick behind the lower leg. There is difficulty walking immediately. It may be difficult to push off or stand on the toes of the injured leg.
It lies anterior to the calcaneal tendon and terminates on the calcaneal tendon or the superior or medial aspect of the calcaneus via fleshy fibers or a distinct tendon. [3] Present in approximately 3% (or 10%) [4] of people, this muscle usually appears as a distant belly, medial to the Achilles tendon. Clinically, the accessory soleus may be ...