It has a downward projection on the side called malleolus. This border gives attachment to an intermuscular septum, which separates the extensor muscles on the anterior surface of the leg from the peronaei longus and brevis on the lateral surface. Threaded portion 34 engages the crest of the corrugated sheet. Surfaces The surface lies between the anterior and interosseus borders. The bone was so called because it resembles a clasp like a modern safety pin. In its upper two thirds, the interosseous border lies very close to the anterior border and may be indistinguishable from it. The only parts of the fibula that show on the surface of the human body are the head at its proximal end and the lateral malleolus at its distal end.
The rectus abdominis is an important postural muscle. In patients approaching skeletal maturity, at 8-10 months of age, the implants can be left in place. It gives attachment to an aponeurosis which separates the tibialis posterior from the soleus and flexor hallucis longus. The tibia is classified as a long bone due to its long, narrow shape. Coracobrachialis The Coracobrachialis is the smallest of the three muscles that attach to the coracoid process of the scapula. It is not part of the rotator cuff.
The lower part is smooth and may be covered with hyaline cartilage. While this our the first visit to this area, it's not the first time we've mentioned the most prominent muscle here-- the tibialis anterior. The forward flat part of the tibia is called the fibia, often confused with the fibula. They also protect the organs in the abdomen. In its upper three fourths it is concave and is directed laterally, and in its lower one fourth it is directed forwards. The fibula is the slenderest of all the long bones. The leg bones femur, tibia and fibula are the strongest as they have to support the rest of the body.
Immediately below the head, the fibula constricts and the part is referred to as neck of the fibula. Muscles are usually work in pairs because although they can contract and shorten flex , they are pulled by an opposite antagonist muscle to straighten out extend again. Physiotherapy can be used to help promote joint motion. Clinical Signs The animal will be unable to fix the stifle during weight-bearing, leading to lameness and decreased weight-bearing on the affected leg. It is well-marked and prominent at the upper and middle parts of the bone. The remaining part of the posterior surface is smooth and covered by the Tibialis posterior, , and. The anterior aspect of the condyle bears a flattened impression.
Its lateral surface is convex, rough, and prominent in front: on it is an eminence, situated on a level with the upper border of the tuberosity and at the junction of its anterior and lateral surfaces, for the attachment of the iliotibial band. The or formation of the bone starts from three centers; one in the shaft and one in each extremity. Two additional centers occasionally exist, one for the tongue-shaped process of the upper epiphysis, which forms the tuberosity, and one for the medial malleolus. The anterior border is subcutaneous and forms the shin. The flatter outer margins are in contact with the menisci.
In some animals, the reduction of the fibula has proceeded even further than it has in humans, with the loss of the tarsal articulation, and, in extreme cases such as the , partial fusion with the tibia. This brief article displays Pictures Of Anterior Crest Of The Tibia. Flexion will often bend a limb, such as when flexing the bicep, thus bending the elbow. Its lower extremity inclines a little forward, so as to be on a plane anterior to that of the upper end; it projects below the tibia, and forms the lateral part of the. At the lower end, it divides to enclose an elongated triangular area which is continuous with the surface of the malleolus.
The tibial tubercle will be displaced proximally if it is avulsed. It extends past the lower end of the tibia and forms the outer part of the ankle providing stability to this joint. The posterior surface of the medial condyle bears a horizontal groove for part of the attachment of the , whereas the lateral condyle has a circular facet for articulation with the. Ossification begins in the body about the eighth week of , and extends toward the extremities. As we can see in the diagram above, the tibia's anterior crest and medial surface come right to the surface of the body, while its lateral surface is covered by the tibialis anterior muscle.
It also helps in keeping the internal organs intact and in creating pressure inside the abdomen, such as when exercising or lifting heavy weights, during forceful defecation or pushing during childbirth. Surfaces of Fibula The medial surface It lies between the anterior and interosseus borders. The fibula is very thin bone compared to the tibia and can be expended except for small length distally. It also helps in pulling in the abdomen. Please click on the image s to view larger version.
Immediately below the popliteal line is the nutrient foramen, which is large and directed obliquely downward. While the epiphyses are the two rounded extremities of the bone; an also known as superior or proximal closest to the and a also known as inferior or distal closest to the. The surface lies between the anterior and interosseus borders. On the posterior surface, the condyle has a groove. It extends the leg, contributes to flexion of the thigh, and is controlled by the femoral nerve.