Seventh cranial nerve
The seventh cranial nerve is the facial nerve, a mixed nerve that has fibers both going out and coming in (both efferent and afferent fibers). It supplies the muscles of facial expression.
Paralysis of the facial nerve causes a characteristic picture with drooping of one side of the face, inability to wrinkle the forehead, inability to whistle, inability to close the eye and deviation of the mouth toward the other side of the face. Paralysis of the facial nerve is called Bell’s palsy.
- Seventh cranial nerve paralysis
Known as Bell’s palsy, this is paralysis of the facial nerve, the nerve that supplies the facial muscles on one side of the face. The cause of Bell’s palsy is not known, but it is thought to be related to a virus (or to various viruses). Bell’s palsy typically starts suddenly and causes paralysis of […]
- Sever condition
Inflammation of the growth plate of the calcaneus, the bone at the back of the heel. The inflammation is at the point where the Achilles tendon attaches. Sever condition occurs mainly in adolescent or older children, particularly active boys. It can be very painful. It is one of those conditions often dismissed as “growing pains”. […]
- Severe acute respiratory syndrome
dry cough; shortness of breath; chest pain when coughing or breathing; diarrhea; sore throat; runny nose. A specific blood test for SARS does not exist. Most people who get SARS need to go to the hospital and it can be fatal. Currently there are no specific anti-viral medications that are effective against SARS. See your […]
- Severe combined immunodeficiency disease
X-linked SCID, the most common type, a genetic flaw damages molecules that allow T cells and B cells to receive signals from crucial growth factors. ADA deficiency results from the lack of an enzyme called adenosine deaminase (ADA) that helps cells, especially immune cells, to get rid of toxic byproducts. Without ADA, poisons build up […]
- 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 increased risk for […]