What is the physical structure in the brain that can trigger the intense fear associated with phobias? what other physical reactions are caused by the sense of fear?

The physical structure in the brain that can trigger the intense fear associated with phobias is amygdala. A small part of our brain, called the amygdala, helps us to decode emotions, evaluate levels of perceived threat, and determine how to respond. The other reactions caused by sense of fear are speeding up of breathe,your heart racing up,and your muscles tightening up. It is responsible for our physical and behavioral reactions to a perceived threat. Together, these reactions create a “fight or flight” response.

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