Seizure, Jacksonian
A form of seizure that involves brief alterations in movement, sensation, or nerve function that is caused by abnormal electrical activity in a localized area of the brain. Jacksonian seizures typically cause no change in awareness or alertness. They are transient, fleeting, and ephemeral.
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- Seizure, myoclonic
A seizure that is characterized by jerking (myoclonic) movements of a muscle or muscle group, without loss of consciousness.
- Selective Estrogen-Receptor Modulator (SERM)
A “designer estrogen” which possesses some, but not all, of the actions of estrogen. For example, raloxifene (trade name EVISTA) is classified as a SERM because it prevents bone loss (like estrogen) and lowers serum cholesterol (like estrogen) but (unlike estrogen) does not stimulate the endometrial lining of the uterus.
- selective mutism
An inability to speak in certain situations. See also apraxia, autism, mutism.
- Selective tubal occlusion procedure
(The acronym for selective tubal occlusion procedure is STOP.) A nonsurgical form of permanent birth control in which a physician inserts a 4-centimeter (1.6 inch) long metal coil into each one of a woman’s two fallopian tubes via a scope passed through the cervix into the uterus and thence into the openings of the fallopian […]
- Selenium
An essential mineral that is a component of an antioxidant enzyme, glutathione reductase, that is key in tissue respiration. Food sources of selenium include seafoods; some meats, such as kidney and liver; and some grains and seeds. Too much selenium may cause reversible balding and changes in the nails, give a garlic odor to the […]