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In fear conditioning, the main circuits that are involved are the sensory areas that process the conditioned and unconditioned stimuli, certain regions of the amygdala that undergo plasticity (or long-term potentiation) during learning, and the regions that bear an effect on the expression of specific conditioned responses.
Pavlovian fear conditioning is a behavioral paradigm in which organisms learn to predict aversive events. [1] It is a form of learning in which an aversive stimulus (e.g. an electrical shock) is associated with a particular neutral context (e.g., a room) or neutral stimulus (e.g., a tone), resulting in the expression of fear responses to the originally neutral stimulus or context.
The common practice of calling brain circuits that detect and respond to threats "fear circuits" implies that these circuits are responsible for feelings of fear. LeDoux has argued that so-called Pavlovian fear conditioning should be renamed Pavlovian threat conditioning to avoid the implication that "fear" is being acquired in rats or humans. [15]
The amygdala, located in the temporal lobe, is a key brain region involved in the conditioned fear response and contributes to the autonomic, hormonal, and behavioral factors associated with that response. According to studies by Coover, Murison, & Jellestad and Davis and LeDoux in 1992, when a dog's amygdala is damaged, it does not show fear ...
For the areas in the brain involved in emotion - most specifically, fear - the processing and response to emotional stimuli can be altered when there are damage to any of these regions. Damage to the cortical areas involved in the limbic system, such as the cingulate cortex or frontal lobes, has resulted in extreme emotion changes. [ 28 ]
Fear is an unpleasant emotion that arises in response to perceived dangers or threats. Fear causes physiological and psychological changes. It may produce behavioral reactions such as mounting an aggressive response or fleeing the threat, commonly known as the fight-or-flight response. Extreme cases of fear can trigger an immobilized freeze ...
The brain is made up of two halves. Every half's amygdala is made up of a small, round structures located closer to the forehead than ( anterior to) the hippocampus , near the temporal lobes . The amygdalae are involved in detecting and learning which parts of our surroundings are important and have emotional significance.
It is a form of brain surgery that uses radiation to destroy spots of tissue in the brain, while giving significant relief to some people with disabling obsessive-compulsive disorder. The gamma knife directs more than 200 thin beams of gamma radiation at different angles toward a single point in a person's brain.