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  2. Cortical spreading depression - Wikipedia

    en.wikipedia.org/wiki/Cortical_spreading_depression

    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 ...

  3. Optical phenomenon - Wikipedia

    en.wikipedia.org/wiki/Optical_phenomenon

    Diffraction of light through the eyelashes; Haidinger's brush; Monocular diplopia (or polyplopia) from reflections at boundaries between the various ocular media; Phosphenes from stimulation other than by light (e.g., mechanical, electrical) of the rod cells and cones of the eye or of other neurons of the visual system; Purkinje images.

  4. Light exposure during the day linked to a 20% lower risk of ...

    www.aol.com/lifestyle/light-exposure-during-day...

    The researchers found that people who were exposed to high amounts of light at night had a 30% increased risk of developing depression, along with a higher risk of psychosis, bipolar disorder ...

  5. Light effects on circadian rhythm - Wikipedia

    en.wikipedia.org/wiki/Light_effects_on_circadian...

    A delay, caused by light exposure before sleeping, means that the individual will tend to wake up later on the following day(s). The hormones cortisol and melatonin are affected by the signals light sends through the body's nervous system. These hormones help regulate blood sugar to give the body the appropriate amount of energy that is ...

  6. Biology of depression - Wikipedia

    en.wikipedia.org/wiki/Biology_of_depression

    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 ]

  7. Mood swing - Wikipedia

    en.wikipedia.org/wiki/Mood_swing

    Graphical comparison of mood swings, compared with bipolar disorder and cyclothymia. A mood swing is an extreme or sudden change of mood.Such changes can play a positive or a disruptive part in promoting problem solving and in producing flexible forward planning. [1]