Category: R

The breaking apart of a blood vessel, organ, or tissue. The rupture of any organ, blood vessel, or tissue.  

A compulsive tendency to walk backward. It is a symptom of parkinsonism. The pushing back of any part, as of the fetal head in labor. A reverse movement, occasionally observed in Parkinson’s disease.  

Microscopic, almost nonelastic, branching fibers of connective tissue that join together to form a delicate supportive meshwork around blood vessels, muscle fibers, glands, nerves, etc. They are composed of a collagen like protein (reticulin) and are particularly common in lymph nodes, the spleen, liver, kidneys, and muscles. One of the extremely fine argyrophilic (silver-staining) fibers…

A memory defect in which items that have been registered in the memory are lost from storage. It is a feature of dementia. The inability to recall a name, number, or fact shortly after being requested to remember it.  

A thick bundle of nerve fibers that conveys impulses form tracts in the spinal cord to the cortex of the anterior and posterior lobes of the cerebellum. One of the inferior cerebellar peduncles of the brain, found along the lateral border of the fourth ventricle. These two bands of fibers, principally ascending, connect the medulla…

The extra volume of air that an individual could inhale or exhale if he is not breathing to the limit of his capacity. The additional amount of air that a person could breathe in or out if he or she were not using the full capacity of their lungs.  

A bone that is formed by replacing cartilage with bony material.  

An enzyme produced in the stomach that coagulates milk. It is secreted by the gastric glands in an inactive form, prorennin, which is activated by hydrochloric acid. Rennin converts caseinogen (milk protein) into insoluble casein in the presence of calcium ions. This insures that the milk remains in the stomach, exposed to protein-digesting enzymes, for…

Any profession (including occupational therapy, physiotherapy and speech therapy) in which the therapists use their skills to assist those with handicap to achieve living and working standards as near normal as possible.  

A unit dose of ionizing radiation equal to the dose that gives the same biological effect as that due to one roentgen of X-rays. The cumulative quantity of radiation that has been absorbed by an individual.