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2. Major depressive disorder - Wikipedia

   en.wikipedia.org/wiki/Major_depressive_disorder

   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 ...

3. Depression (mood) - Wikipedia

   en.wikipedia.org/wiki/Depression_(mood)

   Depressed mood is a symptom of some mood disorders, also categorized and called depression, such as major depressive disorder, bipolar disorder and dysthymia; [7] it is a normal temporary reaction to life events, such as the loss of a loved one; and it is also a symptom of some physical diseases and a side effect of some drugs and medical ...

4. Major depressive episode - Wikipedia

   en.wikipedia.org/wiki/Major_depressive_episode

   A major depressive episode (MDE) is a period characterized by symptoms of major depressive disorder. Those affected primarily exhibit a depressive mood for at least two weeks or more, and a loss of interest or pleasure in everyday activities. Other symptoms can include feelings of emptiness, hopelessness, anxiety, worthlessness, guilt ...

5. How depression may worsen memory decline in older adults

   www.aol.com/depression-may-worsen-memory-decline...

   Robby Berman. June 14, 2024 at 8:39 AM. A new study demonstrates that depression may worsen memory decline, but one condition may also exacerbate the other. Greg Schmigel/ Stocksy. It has long ...

6. Mental disorder - Wikipedia

   en.wikipedia.org/wiki/Mental_disorder

   A mental disorder, also referred to as a mental illness, [6] a mental health condition, [7] or a psychiatric disability, [2] is a behavioral or mental pattern that causes significant distress or impairment of personal functioning. [8] A mental disorder is also characterized by a clinically significant disturbance in an individual's cognition ...

7. Biology of depression - Wikipedia

   en.wikipedia.org/wiki/Biology_of_depression

   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.