Fibula
Fibula: The smaller of the two bones in the lower leg. The end of the fibula forms the bony prominence of the outer ankle.
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- Fibulin 3
Fibulin 3: A protein that belongs to a family of extracellular proteins expressed in the basement membranes of blood vessels. The gene that encodes fibulin 3 is FBLN3 (or EFEMP1). FBLN3 is located on chromosome 2 in band 2p16. A single mutation in FBLN3 is responsible for an autosomal dominant form of macular degeneration. See […]
- Fibulin 5
Fibulin 5: A protein that belongs to a family of extracellular proteins expressed in the basement membranes of blood vessels. Fibulin 5 may be essential for the polymerization of elastin. Missense mutations in FBLN5, the gene that encodes fibulin 5, appear responsible for 1-2% of cases of age-related macular degeneration (AMD). FBLN5 is located on […]
- Field, visual
Field, visual: The entire area that can be seen when the eye is directed forward, including that which is seen with peripheral vision. The visual field can be tested to measure the extent and distribution of the field of vision. The test may be done by a number of methods including what are termed confrontation, […]
- Fievre boutonneuse
Fievre boutonneuse: African tick typhus, one of the tick-borne rickettsial diseases of the eastern hemisphere, similar to Rocky Mountain spotted fever, but less severe, with fever, a small ulcer (tache noire) at the site of the tick bite, swollen glands nearby (satellite lymphadenopathy), and a red raised (maculopapular) rash. The French word “boutonneuse” means pimply. […]
- Fifth cranial nerve
Fifth cranial nerve: The fifth cranial nerve is the trigeminal nerve. The trigeminal nerve is quite complex. It functions both as the chief nerve of sensation for the face and the motor nerve controlling the muscles of mastication (chewing). Problems with the sensory part of the trigeminal nerve result in pain or loss of sensation […]