Proportional counter
A device for measuring radioactivity. More technically, a proportional counter counts the emission of radioactive particles which permits the discrimination between particles or rays of different energies.
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- Proposita
A female through whom a family medically comes to light (is first ascertained). Also called the proband or index case. The male counterpart of a proposita is a propositus.
- Propositus
The initial subject presenting a mental or physical disorder, who causes a study of his or her heredity in order to determine if other members of the family have had the same disease or carry it. Also called index case and proband.
- Proprioception
The ability to sense stimuli arising within the body regarding position, motion, and equilibrium. Even if a person is blindfolded, he or she knows through proprioception if an arm is above the head or hanging by the side of the body. The sense of proprioception is disturbed in many neurological disorders. It can sometimes be […]
- Propylthiouracil (PTU)
A drug that blocks the production of thyroid hormone by the thyroid gland. PTU is used to treat hyperthyroidism, to reduce the excessive thyroid activity before surgery and to treat and maintain patients not having surgery.
- Prosopagnosia (face blindness)
a neurological disorder characterized by an inability to recognize faces. Prosopagnosia is also known as face blindness or facial agnosia and varies in severity among affected individuals. It is believed to arise from damage to an area of the brain known as the right fusiform gyrus. This damage can be caused by trauma, stroke, or […]