Fibula

The fibula (/ˈfɪbjᵿlə/) or calf bone is a leg bone located on the lateral side of the tibia, with which it is connected above and below. It is the smaller of the two bones, and, in proportion to its length, the slenderest 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, 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.

Structure

The bone has the following components:

Fibula (brooch)

A fibula (/ˈfɪbjʊlə/, plural fibulae /ˈfɪbjʊli/) is a brooch or pin for fastening garments. The fibula developed in a variety of shapes, but all were based on the safety-pin principle. Technically, the Latin term, fibulae, refers to Roman brooches; however, the term is widely used to refer to brooches from the entire ancient and early medieval world that continue Roman forms. Nevertheless, its use in English is more restricted than in other languages, and in particular post-Roman brooches from the British Isles are just called brooches (for example, the penannular brooches), where in German they would probably be fibulae.

Unlike most modern brooches, fibulae were not only decorative; they originally served a practical function: to fasten clothing, such as cloaks. Fibulae replaced straight pins that were used to fasten clothing in the Neolithic period and the Bronze Age. In turn, fibulae were replaced as clothing fasteners by buttons in the Middle Ages. Their descendant, the modern safety pin, remains in use today. In ancient Rome and other places where Latin was used, the same word denoted both a brooch and the fibula bone because a popular form for brooches and the shape of the bone were thought to resemble one another.