Category: S

Astigmatism along one meridian only.  

Asthma in which there has been no increase in symptoms or need for additional medication for at least the past 4 weeks.  

A gas that displaces oxygen from the atmosphere, thereby reducing the amount of oxygen available during inhalation.  

A form of JIA that accounts for 20% of all cases; boys are affected 60% of the time. Fever and rash may be the presenting symptoms, either with or without joint involvement. Ultimately, 25% of these children develop severe arthritis.  

Arthritis that occurs in the secondary and tertiary stages of syphilis and is marked by tenderness, swelling, and limitation of motion.  

Inflammation of the synovial tissues in a joint as the result of a pyogenic (pus-forming) bacterial infection. Once infection occurs, cartilage is destroyed and the joint space narrows. Patients at greatest risk are those with pre-existing arthritis, joint trauma, or immune deficiencies and those who use intravenous drugs. Septic shock is a critical condition characterized…

The middle cerebral artery in the fissure of Sylvius.  

A branch of the thoracic aorta, supplying blood to the diaphragm.  

A branch of the external carotid artery, supplying blood to the parotid glands, cheeks, and temples. A continuation of the external carotid nerve artery; supplies blood to the muscles of the front, side, and top of the head.  

A tiny branch of the anterior spinal artery.