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The soleus muscle is a powerful muscle found in the back of the lower leg, or the calf, in humans and some other mammals. It is involved in standing, walking, and running, and is responsible for pumping venous blood back into the heart from the periphery. The soleus muscle is closely connected to the gastrocnemius muscle, and some anatomists consider the combination of the two to be a single muscle, the triceps surae.
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What You'll Learn
The soleus muscle is located in the lower leg
The soleus muscle is closely connected to the gastrocnemius muscle, and some anatomists consider them to be a single muscle, known as the triceps surae. The plantaris muscle and a portion of its tendon run between these two muscles. The soleus is located deeper within the leg, further from the skin, and is separated from the gastrocnemius by the transverse intermuscular septum.
The soleus muscle is a wide, flat muscle that is part of the group of superficial posterior compartment calf muscles. It is involved in plantar flexion, which is the direction of motion that occurs as the foot and toes point down. The soleus works with the calf muscle to accomplish this task, and it is the most effective muscle for plantar flexion when the knee is bent.
The soleus muscle is composed of mostly slow-twitch muscle fibres, which have high endurance and can withstand contractions and workloads for prolonged periods. This is important for the muscle's role in pumping venous blood back into the heart from the lower leg. The soleus muscle is also known as the skeletal muscle pump, peripheral heart, or sural (tricipital) pump.
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It is involved in standing and walking
The soleus muscle is a powerful muscle in the back of the lower leg (the calf). It runs from just below the knee to the heel and is involved in standing and walking. It is closely connected to the gastrocnemius muscle, and some anatomists consider this combination to be a single muscle, the triceps surae. The soleus muscle is vital in walking, running, and keeping balance.
The soleus muscle plays an important role in maintaining standing posture. If it weren't for its constant pull, the body would fall forward. The soleus is also responsible for pumping venous blood back into the heart from the periphery and is often called the skeletal muscle pump, peripheral heart, or the sural (tricipital) pump.
The action of the calf muscles, including the soleus, is plantar flexion of the foot, which means they increase the angle between the foot and the leg. The soleus is the most effective muscle for plantar flexion in a bent-knee position. During regular movement, such as walking, the soleus is the primary muscle utilized for plantar flexion due to its slow-twitch fibres resisting fatigue.
The human soleus and gastrocnemius muscles are relatively separate, in contrast to some animals, where they are fused for much of their length. The soleus is a complex, multi-pennate muscle in humans, usually having a separate (posterior) aponeurosis from the gastrocnemius muscle. Most soleus muscle fibres originate from each side of the anterior aponeurosis, attaching to the tibia and fibula.
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It is closely connected to the gastrocnemius muscle
The soleus muscle is a powerful muscle in the back part of the lower leg (the calf). It is involved in standing and walking. It is closely connected to the gastrocnemius muscle, and some anatomists consider this combination to be a single muscle, the triceps surae. The gastrocnemius muscle is superficial to (closer to the skin than) the soleus, which lies below the gastrocnemius. The plantaris muscle and a portion of its tendon run between the two muscles.
The soleus muscle is the most effective muscle for plantar flexion in a bent-knee position. The gastrocnemius originates on the femur, so bending the leg limits its effective tension. During regular movement (i.e. walking), the soleus is the primary muscle utilised for plantar flexion due to the slow-twitch fibres resisting fatigue. The soleus is innervated by the tibial nerve.
The gastrocnemius muscle is part of the skeletal muscle system. Skeletal muscles are voluntary muscles, meaning you control how and when they move and work. They are attached by tendons to bones of a skeleton. Skeletal muscles comprise about 35% of the body of humans by weight. The functions of skeletal muscle include producing movement, maintaining body posture, controlling body temperature, and stabilizing joints.
The soleus muscle is also considered a skeletal muscle. It plays an important role in maintaining standing posture; if not for its constant pull, the body would fall forward. In an upright posture, the soleus is responsible for pumping venous blood back into the heart from the periphery, and is often called the skeletal muscle pump, peripheral heart, or the sural (tricipital) pump.
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It is responsible for pumping venous blood back into the heart
The soleus muscle is a powerful muscle in the back part of the lower leg, or the calf. It runs from just below the knee to the heel and is involved in standing and walking. The soleus muscle is closely connected to the gastrocnemius muscle, and some anatomists consider this combination to be a single muscle, the triceps surae. The name "soleus" is derived from the Latin word "solea", meaning "sandal".
The soleus is a complex, multi-pennate muscle in humans, usually having a separate (posterior) aponeurosis from the gastrocnemius muscle. Most soleus muscle fibres originate from each side of the anterior aponeurosis, attaching to the tibia and fibula. The action of the calf muscles, including the soleus, is plantar flexion of the foot, or increasing the angle between the foot and the leg.
The soleus muscle is vital for walking, running, and maintaining balance. It also plays an important role in maintaining standing posture. If not for its constant pull, the body would fall forward.
Additionally, the soleus muscle is responsible for pumping venous blood back into the heart from the periphery. It is often referred to as the skeletal muscle pump, peripheral heart, or the sural (tricipital) pump. The soleus muscle has more slow muscle fibres than many other muscles. Human soleus fibre composition varies, containing between 60% and 100% slow fibres.
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It is the most effective muscle for plantar flexion in a bent knee position
The soleus muscle is a powerful muscle in the back of the lower leg (the calf). It runs from just below the knee to the heel and is involved in standing and walking. It is also vital in running and keeping balance. The soleus is one of the calf muscles in the back of the leg and connects to the Achilles tendon at the heel.
The soleus is the most effective muscle for plantar flexion in a bent knee position. Plantar flexion is a term that describes positioning the foot with the toes furthest down. Standing on tiptoes is an example of plantar flexion. Several muscles control plantar flexion, and any injury to these muscles can limit your range of motion and affect your ability to do activities that require plantar flexion.
The gastrocnemius, which forms half of the calf muscle, is one of the muscles that does most of the work in plantar flexion. However, the gastrocnemius originates on the femur, so bending the leg limits its effective tension. During regular movement (i.e. walking), the soleus is the primary muscle utilised for plantar flexion due to its slow-twitch fibres resisting fatigue.
The soleus muscle plays a major role in plantar flexion. You need this muscle to push your foot away from the ground. It is vitally important for any movement involving plantar flexion.
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Frequently asked questions
The soleus is a powerful muscle in the back part of the lower leg (the calf). It is involved in standing and walking.
The soleus muscle helps to maintain standing posture and is responsible for pumping venous blood back into the heart from the periphery. It is also the most effective muscle for plantar flexion in a bent-knee position.
The soleus muscle is closely connected to the gastrocnemius muscle. Some anatomists consider this combination to be a single muscle, the triceps surae.
The soleus muscle contains a higher proportion of slow-twitch muscle fibres, which resist fatigue.
