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The fibula (pl.: fibulae or fibulas) or calf bone is a leg bone on the lateral side of the tibia, to 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.
The term fibula eventually became the standard name for the bone, but many of the related arteries, muscles, and nerves are still called by the Greek derived name peroneal. The Terminologia Anatomica , the international standard for anatomical nomenclature, states that both fibula and perone derived names are acceptable, but lists the fibula ...
(Ant. super. tibio-fibular lig. labeled at center left, in white.) ... of the head of the fibula ... from page 348 of the 20th edition of Gray's Anatomy ...
Immediately below its origin is the groove for the tendon of the popliteus. [citation needed]The greater part of its lateral surface is covered by the tendon of the biceps femoris; the tendon, however, divides at its insertion into two parts, which are separated by the ligament.
The major bones of the leg are the femur (thigh bone), tibia (shin bone), and adjacent fibula, and these are all long bones. The patella (kneecap) is the sesamoid bone in front of the knee. Most of the leg skeleton has bony prominences and margins that can be palpated and some serve as anatomical landmarks that define the extent of the leg.
In human anatomy, the fibularis longus (also known as peroneus longus) is a superficial muscle in the lateral compartment of the leg. It acts to tilt the sole of the foot away from the midline of the body ( eversion ) and to extend the foot downward away from the body ( plantar flexion ) at the ankle .
The lateral malleolus is the prominence on the outer side of the ankle, formed by the lower end of the fibula. The word malleolus (/ m ə ˈ l iː ə l ə s, m æ-/ [1] [2]), plural malleoli (/ m ə ˈ l iː ə ˌ l aɪ, m æ-/), comes from Latin and means "small hammer". (It is cognate with mallet.)
The fibularis brevis (bottom-most label) is a muscle of the lower leg and aids in plantar flexion and eversion of the foot. The fibularis brevis arises from the lower two-thirds of the lateral, or outward, surface of the fibula (inward in relation to the fibularis longus) and from the connective tissue between it and the muscles on the front and back of the leg.