What is the name for the increase in size of tissue or an organ due to physiological change from old age, or lack of use, nutrition or nerve supply?
Atrophy Atrophy Atrophy is the partial or complete wasting away of a part of the body. Causes of atrophy include mutations (which can destroy the gene to build up the organ), poor nourishment, poor circulation, loss of hormonal support, loss of nerve supply to the target organ, excessive amount of apoptosis of cells, and disuse or lack of exercise or disease intrinsic to the tissue itself. In medical practice, hormonal and nerve inputs that maintain an organ or body part are said to have "trophic" effects. A diminished muscular trophic condition is designated as "atrophy". Atrophy is reduction in size of
Physiological anisocoria Physiological anisocoria Physiological anisocoria is when human pupils differ in size. It is generally considered to be benign, though it must be distinguished from Congenital Horner's syndrome, pharmacological dilatation or other conditions connected to the sympathetic nervous system. The prevalence of physiological anisocoria has not been found to be influenced by the sex, age, or iris color of the subject. The main characteristic that distinguishes physiological anisocoria is an increase of pupil size with lower light or reduced illumination, such that the pupils differ in size between the two eyes. At any given eye examination, up to 41% of healthy