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Depression is a mental state of low mood and aversion to activity. [3] It affects more than 280 million people of all ages (about 3.5% of the global population). [4] Depression affects a person's thoughts, behavior, feelings, and sense of well-being. [5] Depressed people often experience loss of motivation or interest in, or reduced pleasure or ...
Major depressive disorder ( MDD ), also known as clinical depression, is a mental disorder [9] characterized by at least two weeks of pervasive low mood, low self-esteem, and loss of interest or pleasure in normally enjoyable activities. Introduced by a group of US clinicians in the mid-1970s, [10] the term was adopted by the American ...
Antidepressants, mood stabilizers, antipsychotics [1] A mood disorder, also known as an affective disorder, is any of a group of conditions of mental and behavioral disorder [2] where a disturbance in the person's mood is the main underlying feature. [3] The classification is in the Diagnostic and Statistical Manual of Mental Disorders (DSM ...
Biology of depression. Scientific studies have found that different brain areas show altered activity in humans with major depressive disorder (MDD), [1] and this has encouraged advocates of various theories that seek to identify a biochemical origin of the disease, as opposed to theories that emphasize psychological or situational causes.
Economic depression. An economic depression is a period of carried long-term economic downturn that is the result of lowered economic activity in one or more major national economies. Economic depression may be related to one specific country where there is some economic crisis that has worsened but most often reflexes historically the American ...
In the mid-20th century, researchers theorized that depression was caused by a chemical imbalance in neurotransmitters in the brain, a theory based on observations made in the 1950s of the effects of reserpine and isoniazid in altering monoamine neurotransmitter levels and affecting depressive symptoms. [ 32]
e. The Beck Depression Inventory ( BDI, BDI-1A, BDI-II ), created by Aaron T. Beck, is a 21-question multiple-choice self-report inventory, one of the most widely used psychometric tests for measuring the severity of depression. Its development marked a shift among mental health professionals, who had until then, viewed depression from a ...
Unemployed people lined up outside a soup kitchen in Chicago during the Great Depression. The Great Depression (1929–1939) was a severe global economic downturn that affected many countries across the world. It became evident after a sharp decline in stock prices in the United States, leading to a period of economic depression. [1]
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