Updates? Please refer to the appropriate style manual or other sources if you have any questions. The fibula, or calf bone, is a small bone located on the outside of the leg. The lower end of the fibula forms the outer part of the ankle joint. The top end of the fibula is located below the knee joint but is not part of the joint itself. The fibula is slim and roughly four-sided, and its shape varies with … In many mammals, such as the horse and the rabbit, the fibula is fused for part of its length with the tibia. Ankle injuries are often thought of as sports injuries.But you don't have to be an athlete or even a "weekend warrior" to turn your ankle and hurt it. Our website services, content, and products are for informational purposes only. If looking at the slope of a back, the thoracic would be…, The quadratus plantae is a muscle in the foot that extends from the anterior (front) of the calcaneus (heel bone) to the tendons of the digitorum…. Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree.... Anterior view of the bones of the lower right leg, the fibula and the tibia (shinbone). Without it, you couldn’t breathe or walk. This muscle runs along the outside of the back of your thigh and attaches to the top of the fibula (the smaller of the two bones of your lower leg). The fibula is slim and roughly four-sided, and its shape varies with the strength of the attached muscles. Tutorials and quizzes on muscles that act on the leg/ leg muscles (tibia & fibula), using interactive animations and labeled diagrams. Be on the lookout for your Britannica newsletter to get trusted stories delivered right to your inbox. The fibula is a bone located within the lateral aspect of the leg. The knee joint not only is the largest joint in the body but also is perhaps the most complicated one. characteristics including preoperative function, home environment, comorbidities, age, goals, and expectations. While every effort has been made to follow citation style rules, there may be some discrepancies. Though less common that tibial stress fractures, fibular stress fractures can occur, most typically in long-distance runners. The muscles of the face give it general form and contour, help you outwardly express your feelings, and enable you to chew your food. A Femur stress fracture is a hairline fracture of the femur (thigh bone). These cookies do not store any personal information. © 2005-2021 Healthline Media a Red Ventures Company. The radius corresponds to the tibia and the ulna to the fibula. Our editors will review what you’ve submitted and determine whether to revise the article. Necessary cookies are absolutely essential for the website to function properly. Range of motion and broken fibula rehab exercises, as described by the Government of Alberta, can improve function after this injury. Function. The way that the two bones in the lower leg are positioned means that the fibula does not reach up as far as the knee joint; rather, its lower portion, including the specialized groove and tendon mechanism, forms part of the ankle joint, allowing for stability in movement. Unlike most modern brooches, fibulae were not only decorative; they originally served a practical function: to fasten clothing, such as cloaks. The fibula and tibia are the two long bones of the lower leg. This means that even though there is a break in the bone, the ankle joint is still aligned normally. It has three main articulations: Proximal tibiofibular joint – articulates with the lateral condyle of the tibia. Let us know if you have suggestions to improve this article (requires login). The patella , commonly known as the kneecap, is at the center of the knee. Fractures of the fibula usually are associated with an ankle injury, though they can occur in isolation (without ankle involvement) or in combination with fractures of the tibia (e.g., in severe injuries). The fibula is connected via ligaments to the two ends of the tibia. Some tendons are contained within two major grooves at the distal, or bottom, end of the fibula (the lateral malleolus). The human skeletal system is not quite as simple as the popular children's song suggests. It is considered a plane synovial joint, also commonly referred to as a … These grooves redirect force on the joint, allowing less impact to be passed on to the tendons, and thereby minimizing damage. As a result, it is sometimes used as donor stock for bone grafts. The fibula is not a structural bone and it is positioned on the outer edge of the lower leg. This category only includes cookies that ensures basic functionalities and security features of the website. The fibula, or calf bone, is found on the lateral side of the tibia. This is due to the fibula’s major role as an anchor point for the various muscles and ligaments of the leg and ankle. Fibula— a long, thin bone in the lower leg on the lateral side which runs along side the tibia from the knee to the ankle. The fibula helps stabilize the tibia but doesn’t carry much weight. a separate tibia and fibula in the lower leg. This article was most recently revised and updated by, https://www.britannica.com/science/fibula-bone. Its main function is to act as an attachment for muscles, and not as a weight-bearer. The main function of the fibula bone is as a point of attachment for many of the muscles of the lower leg. Many fibular fractures can be treated without surgery, but it is important to ensure the ankle joint remains stable. The base of the fibula forms the outer projection (malleolus) of the ankle and is joined to the tibia and to one of the ankle bones, the talus. The bones involved in it, however, are only the femur and the…. The fibula, sometimes called the calf bone, is smaller than the tibia and runs beside it. The centre of rotation of the subtalar joint is thought to be in the region of the middle facet. The fibula is the name of one of the paired bones within the lower leg of humans. Fibula, outer of two bones of the lower leg or hind limb, presumably so named (fibula is Latin for “brooch”) because the inner bone, the tibia, and the fibula together resemble an ancient brooch, or pin. Healthline Media does not provide medical advice, diagnosis, or treatment. Last medically reviewed on January 21, 2018. Learn even faster with … Semimembranosus. In humans the head of the fibula is joined to the head of the tibia by ligaments and does not form part of the knee. Test both halves of your mind in this human anatomy quiz. The muscle is shaped similar to a parallelogram…, The thoracic section of the backbone stretches between the lumbar and cervical regions. It aids in knee extension and protects the joint. The fibula is the name of one of the paired bones within the lower leg of humans. The other, the tibia, is much thicker, and the fibula connects to it by means of both appropriate articulation and ligaments. The fibula runs parallel to the tibia on the outside of the lower leg, but is smaller. The tibia and fibula are further joined throughout their length by an interosseous membrane between the bones. Ankle stiffness and weakness are common after fibula injury, particularly if you spent time in a cast or using crutches. The fibula developed in a variety of shapes, but all were based on the safety-pin principle. You may know that the human brain is composed of two halves, but what fraction of the human body is made up of blood? Corrections? While about 80-90% of weight is carried by the tibia, the fibula does help to carry some weight as well. The joint allows inversion and eversion of the foot, but plays minimal role in dorsiflexion or plantarflexion of the foot. It branches from the ileocolic artery and may branch further to the…. Pain may come on gradually as a dull ache, which intensifies if a bending force is applied to the femur. Based upon these variables, wide variations of progressions and patient outcomes may exist, however the following is a basic guideline that can be used as a reference. When only the fibula fractures, it is usually because of a direct blow to the side of the leg or an extreme sideways bend at the ankle or knee. Omissions? Located just to the inside of the biceps femoris, this muscle attaches to the tibia (the larger lower-leg bone). The posterior cecal artery is located in the abdomen near the lower intestines. Rehabilitation after a broken fibula focuses on restoring … ; Distal tibiofibular joint – articulates with the fibular notch of the tibia. Semitendinosus. Because the brain processes all of the body’s signals, it houses major nerves to collect the information and get it to the proper section of the brain. Fibula, outer of two bones of the lower leg or hind limb. All rights reserved. The single exception to this among living primates is the tarsier, in which the fibula becomes fused to the tibia.…, >fibula. We’ll go over the different parts of the brain and explain…, The supraspinatus muscle is a rotator cuff muscle located in the shoulder, specifically in the supraspinatus fossa, a concave depression in the rear…, The masseter muscle is a facial muscle that plays a major role in the chewing of solid foods. Lateral Malleolus Fractures (fibula only): Fractures of the fibula alone are the most common type of ankle fracture. In humans the head of the fibula is joined to the head of the inner bone, the tibia, by ligaments and does not form part of the knee. A fibula (/ˈfɪbjʊlə/, plural fibulae /ˈfɪbjʊli/) is a brooch or pin for fastening garments, typically at the right shoulder. Combined with the cardiovascular system, the circulatory system helps to fight off disease, helps the body maintain a normal body temperature, and…, The brain is one of your most important organs. The tibia is the thicker, weight-bearing bone of the two whereas the fibula has much of its surface for muscle attachment. The depressor labii inferioris muscle is a four-sided facial muscle located in the jaw area that draws the lower lip down and to the side. The fibula usually fractures at the same time as the tibia. Although quite rare it is caused by prolonged overuse. Fibula Fractures. It is the smaller of the two bones and plays an important role in stabilizing the ankle and supporting the muscles of the lower leg.
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