A syndrome characterized by a shortened first metatarsal (foot) bone that results in excessive force on the head of the second metatarsal (foot) bone and a hypermobile first metatarsal segment. The external appearance of the foot in Morton’s syndrome is characterized by an abnormally shortened first toe in comparison to the second toe. Calluses are seen on the plantar surface (bottom) of the foot beneath the second and third metatarsal bones.
Symptoms of Morton’s syndrome include pain and tenderness at the base of the first two bones of the foot and at the head of the second metatarsal bone. The pain usually arises with walking or standing and improves with rest.
Morton’s syndrome is usually a hereditary (inherited) condition. The defective first metatarsal bone cannot provide adequate support for the foot, and arch fatigue and pain are common.
Treatment often involves wearing prescription shoe inserts that help prevent the degenerative changes that result from improper alignment. In severe cases, surgery may be recommended to restore proper alignment of the foot.
A person or a tissue that contains two or more types of genetically different cells. All females are mosaics because of X-chromosome inactivation (lyonization). Mosaic patterns can affect the way genetic disorders are expressed. For example, about 5 percent of people with Down syndrome have a mosaic variant in which only some cells have an […]
- Moscati, St. Joseph
(1880-1927) Dr. Giuseppe (Joseph) Mosati, physician from Naples. First modern doctor to be canonized by the Catholic Church (in 1987). Moscati directed several hospitals, served as a doctor in the front lines of World War I, healed, taught and supported the poor and outcast. He was professor of medicine at Naples University.
(1) The female parent. (2) To produce offspring as a female. To attribute the maternity of. (3) A cell or other structure from which similar cells or structures are formed. Accordingly, such a cell might be referred to as the mother cell.(4) To provide maternal protection, guidance, and nurturing to children.
- Motility study, antro-duodenal
A study for detecting and recording the contractions of the muscles of the stomach and the first part of the small intestine (the duodenum). An antro-duodenal motility study is performed to diagnose problems in the way the muscles of the stomach and small intestine are working. To conduct the study, a tube is passed through […]
- Motion sickness
A disorder of the sense of balance and equilibrium and, hence, the sense of spatial orientation that is caused by repeated motion such as from the swell of the sea, the movement of a car, or the motion of a plane in turbulent air. Motion sickness is due to irritation of a portion of the […]