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This is a diagram of the seasons. Regardless of the time of day (i.e. Earth 's rotation on its axis), the North Pole will be dark, and the South Pole will be illuminated; see also arctic winter . Figure 3 shows the angle of sunlight striking Earth in the Northern and Southern Hemispheres when Earth's northern axis is tilted away from the Sun ...
Psychiatry. Seasonal affective disorder (SAD) is a mood disorder subset in which people who typically have normal mental health throughout most of the year exhibit depressive symptoms at the same time each year. [1][2] It is commonly, but not always, associated with the reductions or increases in total daily sunlight hours that occur during the ...
A season is a division of the year [ 1 ] based on changes in weather, ecology, and the number of daylight hours in a given region. On Earth, seasons are the result of the axial parallelism of Earth's tilted orbit around the Sun. [ 2 ][ 3 ][ 4 ] In temperate and polar regions, the seasons are marked by changes in the intensity of sunlight that ...
Left-brain interpreter. The left cerebral hemisphere of the brain. The left-brain interpreter is a neuropsychological concept developed by the psychologist Michael S. Gazzaniga and the neuroscientist Joseph E. LeDoux. [1][2] It refers to the construction of explanations by the left brain hemisphere in order to make sense of the world by ...
Contralateral brain. The contralateral organization of the forebrain (Latin: contra‚ against; latus‚ side; lateral‚ sided) is the property that the hemispheres of the cerebrum and the thalamus represent mainly the contralateral side of the body. Consequently, the left side of the forebrain mostly represents the right side of the body, and ...
Michael S. Gazzaniga (born December 12, 1939) is an American psychologist who is a professor of psychology at the University of California, Santa Barbara, where he heads the new SAGE Center for the Study of the Mind. [2] He is one of the leading researchers in cognitive neuroscience, the study of the neural basis of mind. [3]
It occurs after autumn and before spring. The tilt of Earth's axis causes seasons; winter occurs when a hemisphere is oriented away from the Sun. Different cultures define different dates as the start of winter, and some use a definition based on weather. When it is winter in the Northern Hemisphere, it is summer in the Southern Hemisphere, and ...
One international study on seasonal effects on suicide rates involving 20 countries showed an early summer peak in suicides. She concluded that "seasonal variation in suicide incidence could be explained by the increase in sunshine in summer months because of a relationship between sunshine, high temperatures, and suicide rate". [6]