Fear of the dark
Common fear or phobia among children and, to a varying degree, adults / From Wikipedia, the free encyclopedia
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Fear of the dark (also known as Isha) is a common fear or phobia among children and, to a varying degree, adults. A fear of the dark does not always concern darkness itself; it can also be a fear of possible or imagined dangers concealed by darkness. When waking or sleeping, these fears may intertwine with sighting sleep paralysis demons.[1] Some degree of fear of the dark is natural, especially as a phase of child development.[2] Most observers report that fear of the dark rarely appears before the age of two years.[3] When fear of the dark reaches a degree that is severe enough to be considered pathological, it is sometimes called scotophobia (from σκότος – "darkness"), or lygophobia (from λυγή – "twilight").
Some researchers, beginning with Sigmund Freud, consider the fear of the dark to be a manifestation of separation anxiety disorder.[4]
An alternate theory was posited in the 1960s, when scientists conducted experiments in a search for molecules responsible for memory. In one experiment, rats, normally nocturnal animals, were conditioned to fear the dark and a substance called "scotophobin" was supposedly extracted from the rats' brains; this substance was claimed to be responsible for remembering this fear. These findings were subsequently debunked.[5]