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Dermal or subcutaneous atrophy is represented by depression of the skin. [29] Maceration: softening and turning white of the skin due to being consistently wet. Umbilication is formation of a depression at the top of a papule, vesicle, or pustule. [34] Phyma: A tubercle on any external part of the body, such as in phymatous rosacea
[19] [20] Clinically, the diagnosis of any particular skin condition is made by gathering pertinent information regarding the presenting skin lesion(s), including the location (such as arms, head, legs), symptoms (pruritus, pain), duration (acute or chronic), arrangement (solitary, generalized, annular, linear), morphology (macules, papules ...
Cortical spreading depression (CSD) or spreading depolarization (SD) is a wave of electrophysiological hyperactivity followed by a wave of inhibition. [3] Spreading depolarization describes a phenomenon characterized by the appearance of depolarization waves of the neurons and neuroglia [ 4 ] that propagates across the cortex at a velocity of 1 ...
A rash is a change of the skin that affects its color, appearance, or texture.. A rash may be localized in one part of the body, or affect all the skin. Rashes may cause the skin to change color, itch, become warm, bumpy, chapped, dry, cracked or blistered, swell, and may be painful.
Isotretinoin, which is a powerful derivative of vitamin A, rarely causes papilledema. medications like tetracycline; Hypervitaminosis A, in some people who take megadoses of nutritional supplements and vitamins. Hyperammonemia, elevated level of ammonia in blood (including cerebral edema/intracranial pressure)
The biology of depression is the attempt to identify a biochemical origin of depression, as opposed to theories that emphasize psychological or situational causes. Scientific studies have found that different brain areas show altered activity in humans with major depressive disorder (MDD) . [ 1 ]
Macular edema occurs when fluid and protein deposits collect on or under the macula of the eye (a yellow central area of the retina) and causes it to thicken and swell . The swelling may distort a person's central vision , because the macula holds tightly packed cones that provide sharp, clear, central vision to enable a person to see detail ...
This article needs to be updated. The reason given is: Many outdated sources and information (older than five years). Please help update this article to reflect recent events or newly available information. (July 2024) Medical condition Major depressive disorder Other names Clinical depression, major depression, unipolar depression, unipolar disorder, recurrent depression Sorrowing Old Man (At ...