A type of plague that is spread by ground squirrels and other wild rodents. Sylvatic plague is sometimes seen in the western portion of the US.
- Sylvius, aqueduct of
A canal between the third and fourth ventricles in the brain within the system of four communicating cavities that are continuous with the central canal of the spinal cord. The ventricles are filled with cerebrospinal fluid, which is carried by the aqueduct of Sylvius.
- Symbol of medicine
A staff or a rod with a snake curled around it; the staff of Aesculapius, also called Asklepios, the ancient mythical god of medicine. For more information, see; Medical symbol.
- Symmetric lipomatosis, multiple
A disorder characterized by painless symmetrical diffuse deposits of fat beneath the skin of the neck, upper trunk, arms and legs. The condition is thought to be genetic although its exact mode of inheritance is uncertain. It may be a mitochondrial DNA disease. It frequently appears in association with alcoholic liver disease, macrocytic anemia (“low […]
- Sympathetic nervous system
A part of the nervous system that serves to accelerate the heart rate, constrict blood vessels, and raise blood pressure. The sympathetic nervous system and the parasympathetic nervous system constitute the autonomic nervous system.
- Sympathetic ophthalmia
Inflammation of the uveal tract of the uninjured eye (sympathizing eye) some weeks after a wound involving the uveal tract of the other eye (exciting eye). Also known as transferred ophthalmia.