Category: O

A clinical test for tightness of the iliotibial band. The patient lies on the uninvolved side and abducts the hip maximally in neutral flexion. The examiner stands behind the patient, with the patient’s foot resting on the examiner’s arms with the thigh supported. The thigh is then released. The result is negative if the abducted…

A craniometric point on the sagittal suture between the two parietal foramina.  

Ground, rolled, or steel-cut oats from which a cereal can be made. Oatmeal has several therapeutic uses. In the diet, it provides fiber, lowers cholesterol levels, and can safely be consumed by patients with wheat allergies or celiac sprue because it has no gliaden. Oatmeal is also sometimes used in tepid baths or soaps to…

An area of healthy tissue surrounded by a diseased portion.  

The external layer of woody plants of the genus Quercus, sometimes used by alternative medicine practitioners as an anti-inflammatory and antidiarrheal.  

A rhythmic jerk nystagmus occurring when one is looking at constantly moving objects (e.g., viewing telephone poles from a moving car or train).  

A nucleus in the central gray matter of the midbrain lying below the rostral end of the cerebral aqueduct.  

Pathological injury to the optic nerves or the blood supply to them. Usually, only one eye is affected. Several forms have been described, including ischemic optic neuropathy (which if prolonged leads to blindness in the affected eye); optic neuritis due to acute demyelination of optic nerve fibers; infiltrative optic neuropathy (in which the optic nerve…

Neuralgia involving the upper cervical nerves, usually caused by nerve entrapment. A type of headache that originates from the upper neck, often radiating toward the back of the head and the scalp on one or both sides. The pain may be chronic or intermittent and may extend all the way up the scalp to the…

Neoplasm in which the structure is similar to that of some organ of the body.