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Symptoms of Bipolar Disorder. The single most telling symptom of bipolar disorder is the episodic oscillation between high and low mood states — characteristic shifts between depression, normal ...
Mood swings in Premenstrual symptoms (PMS): Episodically at mild to severe degree in the menses period, occur gradually or rapidly, [49] start 7 days before and decrease at the onset of menses. [50] Characterized by angry outbursts, depression, anxiety, confusion, irritability or social withdrawal. [51]
Stress can cause depression and depression-like symptoms through monoaminergic changes in several key brain regions as well as suppression in hippocampal neurogenesis. [118] This leads to alteration in emotion and cognition related brain regions as well as HPA axis dysfunction.
Scientists may be a step closer to that reality, thanks to new research that has identified six subtypes — or “biotypes” — of major depression via brain imaging combined with machine learning.
Richard Caton discovered electrical activity in the cerebral hemispheres of rabbits and monkeys and presented his findings in 1875. [4] Adolf Beck published in 1890 his observations of spontaneous electrical activity of the brain of rabbits and dogs that included rhythmic oscillations altered by light, detected with electrodes directly placed on the surface of the brain. [5]
For example, human subjects with high depression scores exhibit differential gamma signaling when performing emotional, spatial, or arithmetic tasks. Increased gamma signaling is also observed in brain regions that participate in the default mode network, which is normally suppressed during tasks requiring significant attention. Rodent models ...
Cyclothymia (/ ˌ s aɪ k l ə ˈ θ aɪ m i ə /, siy-kluh-THIY-mee-uh), also known as cyclothymic disorder, psychothemia / psychothymia, [5] bipolar III, [6] affective personality disorder [7] and cyclothymic personality disorder, [8] is a mental and behavioural disorder [9] that involves numerous periods of symptoms of depression and periods of symptoms of elevated mood. [3]
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 ...
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