
Fear
Basic emotion induced by a perceived threat

Basic emotion induced by a perceived threat
Fear is an emotional state which is aroused by threatening situations. It is usually considered to be a negative, unpleasant emotion. The feeling of fear can result directly from certain kinds of sensory stimulation, such as sounds which resemble screaming. Fear can also be evoked by the anticipation that undesirable events will, or may, occur, and is useful in providing motivation to avoid or mitigate risks. It may also be the result of imagining threats to oneself or others, whether or not those threats are real or possible. Fear is associated with a number of physiological states. In humans, fear is correlated with more rapid breathing and heart rate, dilation of the pupils, spikes in cortisol levels, and elevated electrodermal activity. These changes overlap considerably with the physiology of anger, sadness, disgust, anxiety, and other negative, arousing emotions. Fear is also associated with behavioural reactions like the startle response, the fight-or-flight response, and the freeze...
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