Researchers at Linköping University, Sweden, have discovered a biological mechanism that increases the strength with which fear memories are stored in the brain. The study, carried out in rats, is published in Molecular Psychiatry. It provides new knowledge on the mechanisms behind anxiety-related disorders, and identifies shared mechanisms behind anxiety and alcohol dependence.
Researchers at Linköping University, Sweden, have discovered a biological mechanism that increases the strength with which fear memories are stored in the brain. The study, carried out in rats, is published in. It provides new knowledge on the mechanisms behind anxiety-related disorders, and identifies shared mechanisms behind anxiety and alcohol dependence.
The ability to experience fear is essential for escaping life-threatening situations and learning to avoid them in the future. In some conditions, however, such as and other anxiety-related disorders, the fear reactions become excessive and persist even when they are no longer appropriate. This triggers intense anxiety even though the danger is no longer present, and leads to disability for the person who is affected. Researchers suspect that certain individuals have a greater tendency to develop pathological fears, and that this is caused by disorders in the way that the brain processes fearful memories.
Some areas of the brain are particularly important for processing fear-related memories. The amygdala is activated when threats are experienced, and works together with parts of the frontal brain lobes, the""We know that the network of nerve cells that connects the frontal lobes to the amygdala is involved in fear responses.
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