shoulder A structure that is made up of two main bones: the scapula (shoulder blade) and the humerus (the long bone of the upper arm). The end of the scapula, called the glenoid, is a socket into which the head of the humerus fits, forming a flexible ball-and-socket joint. The scapula is an unusually shaped…
The shoulder blade, or scapula, is a large, flat, triangular bone located on the posterior side of the ribcage, on either side of the spine. It is one of the three main bones forming the shoulder girdle, connecting the clavicle (collarbone) to the humerus (upper arm bone) and forming part of the shoulder joint socket….
shoulder joint The flexible ball-and-socket joint that is formed by the junction of the humerus and the scapula. The shoulder joint is cushioned by cartilage that covers the face of the glenoid socket and the head of the humerus. The joint is stabilized by a ring of fibrous cartilage (labrum) around the glenoid socket. Ligaments…
Shulman syndrome See eosinophilic fasciitis.
seven-day measles See measles.
seventh cranial nerve See facial nerve.
seventh cranial nerve paralysis See Bell’s palsy.
Sever condition See apophysitis calcaneus.
severe acute respiratory syndrome (SARS) A serious, sometimes fatal, form of pneumonia due to a novel coronavirus. SARS first appeared in an outbreak late in 2002.
severe congenital neutropenia One of several genetic disorders of the bone marrow that is evident at birth and characterized by a lack of neutrophils (a type of white blood cells that are important in fighting infection). Children with severe congenital neutropenia suffer from frequent bacterial (but not viral or fungal) infections. They are also at…
sexual addiction Having an unusually intense sex drive or obsession with sex that is disruptive and dominates the addict’s thinking and daily life. Associated behaviors may include voyeurism, compulsive masturbation, unsafe sex practices, and having multiple or anonymous partners. Sexual addiction can be associated with risk-taking behaviors. For some, the addiction involves illegal activities, such…
sexually transmitted disease Any disease that is transmitted via sexual contact; is caused by microorganisms that survive on the skin or mucous membranes of the genital area; or is transmitted via semen, vaginal secretions, or blood during intercourse. Abbreviated STD. Because the genital area provides a moist, warm environment that is especially conducive to the…