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Fibula
 
 
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For other uses see fibula (disambiguation)
Fibula (disambiguation)

Fibula or Fibulae may mean*Fibula, the calf-bone of a mammal.*Fibula , clothing ornaments used in the ancient world*Brooch, clothing ornament....


The fibula or calf bone is a bone
Bone

Bones are rigid organ that form part of the endoskeleton of vertebrates. They function to move, support, and protect the various organs of the body, produce red blood cell and white blood cells and store minerals....
 located on the lateral side of the tibia
Tibia

The tibia, shinbone, or shankbone is the larger and stronger of the two bones in the leg below the knee in vertebrates and connects the knee with the ankle bones....
, with which it is connected above and below. It is the smaller of the two bones, and, in proportion to its length, the most slender of all the long bones. Its upper extremity is small, placed toward the back of the head of the tibia, below the level of the knee-joint
Knee

----The knee is the lower extremity joint connecting the femur, patella, and the tibia and the surrounding anatomical region which includes the popliteal fossa, also known as "knee pit"....
, and excluded from the formation of this joint.






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For other uses see fibula (disambiguation)
Fibula (disambiguation)

Fibula or Fibulae may mean*Fibula, the calf-bone of a mammal.*Fibula , clothing ornaments used in the ancient world*Brooch, clothing ornament....


The fibula or calf bone is a bone
Bone

Bones are rigid organ that form part of the endoskeleton of vertebrates. They function to move, support, and protect the various organs of the body, produce red blood cell and white blood cells and store minerals....
 located on the lateral side of the tibia
Tibia

The tibia, shinbone, or shankbone is the larger and stronger of the two bones in the leg below the knee in vertebrates and connects the knee with the ankle bones....
, with which it is connected above and below. It is the smaller of the two bones, and, in proportion to its length, the most slender of all the long bones. Its upper extremity is small, placed toward the back of the head of the tibia, below the level of the knee-joint
Knee

----The knee is the lower extremity joint connecting the femur, patella, and the tibia and the surrounding anatomical region which includes the popliteal fossa, also known as "knee pit"....
, and excluded from the formation of this joint. 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 ankle-joint.

Components

The bone has the following components:
  • Body of fibula
    Body of fibula

    The body of fibula presents four borders - the antero-lateral, the antero-medial, the postero-lateral, and the postero-medial; and four surfaces - anterior, posterior, medial, and lateral....
  • Lateral malleolus
  • Interosseous membrane
    Interosseous membrane

    An interosseous membrane is a broad and thin plane of fibrous tissue that separates many of the bones of the body. It is an important component of many joints....
     connecting the fibula to the tibia, forming a syndesmoses
    Syndesmoses

    Syndesmoses are joints at which two bones are bound together by a ligament only. Syndesmoses are the most movable of the fibrous joints. The radius and ulna are bound to each other side by side, as are the tibia and fibula, by a syndesmosis in which the ligament forms a broad sheet called an interosseous membrane along the shafts of the two...
     joint
  • The superior tibiofibular articulation
    Superior tibiofibular articulation

    The superior tibiofibular articulation is an arthrodial joint between the lateral condyle of the tibia and the head of the fibula.The contiguous surfaces of the bones present flat, oval facets covered with cartilage and connected together by an articular capsule and by anterior and posterior ligaments....
     is an arthrodial joint
    Joint

    A joint is the location at which two or more bones make contact. They are constructed to allow movement and provide mechanical support, and are classified structurally and functionally....
     between the lateral condyle
    Lateral condyle

    Lateral condyle can refer to:* Lateral condyle of tibia* Lateral condyle of femur* Lateral condyle on metatarsal...
     of the tibia
    Tibia

    The tibia, shinbone, or shankbone is the larger and stronger of the two bones in the leg below the knee in vertebrates and connects the knee with the ankle bones....
     and the head of the fibula.
  • The inferior tibiofibular articulation
    Inferior tibiofibular articulation

    The inferior tibiofibular articulation is formed by the rough, convex surface of the medial side of the lower end of the fibula, and a rough concave surface on the lateral side of the tibia....
     (tibiofibular syndesmosis) is formed by the rough, convex surface of the medial side of the lower end of the fibula, and a rough concave surface on the lateral side of the tibia
    Tibia

    The tibia, shinbone, or shankbone is the larger and stronger of the two bones in the leg below the knee in vertebrates and connects the knee with the ankle bones....
    .


Blood supply

The blood supply is important for planning free tissue transfer
Microsurgery

Microsurgery is a general term for surgery requiring an operating microscope. The most obvious developments have been procedures developed to allow anastomosis of successively smaller blood vessels and nerves which have allowed transfer of tissue from one part of the body to another and re-attachment of severed parts....
 because the fibula is commonly used to reconstruct the mandible
Mandible

The mandible or inferior maxillary bone forms the lower jaw and holds the lower tooth in place. It also refers to both the upper and lower sections of the beaks of birds....
. The shaft is supplied in its middle third by a large nutrient vessel from the peroneal artery. It is also perfused from its periosteum
Periosteum

Periosteum is a membrane that lines the outer surface of all bone, except at the joints of long bones. Endosteum lines the inner surface of all bones....
 which receives many small branches from the peroneal artery. The proximal head and the epiphysis
Epiphysis

The epiphysis is the rounded end of a long bone, at its joint with adjacent bone. Between the epiphysis and diaphysis lies the metaphysis, including the epiphyseal plate ....
 are supplied by a branch of the anterior tibial artery. In harvesting the bone the middle third is always taken and the ends preserved (4cm proximally and 6cm distally)

Ossification

The fibula is ossified from three centers, one for the shaft, and one for either end. Ossification begins in the body about the eighth week of fetal life, and extends toward the extremities. At birth the ends are cartilaginous.

Ossification commences in the lower end in the second year, and in the upper about the fourth year. The lower epiphysis
Epiphysis

The epiphysis is the rounded end of a long bone, at its joint with adjacent bone. Between the epiphysis and diaphysis lies the metaphysis, including the epiphyseal plate ....
, the first to ossify, unites with the body about the twentieth year; the upper epiphysis joins about the twenty-fifth year.

See also

  • Bone terminology
    Bone

    Bones are rigid organ that form part of the endoskeleton of vertebrates. They function to move, support, and protect the various organs of the body, produce red blood cell and white blood cells and store minerals....
  • Terms for anatomical location


Additional images


External links