... phobias are 1. situational phobias such as: fear of elevators, airplanes, enclosed places, public transportation, tunnels, or bridges; 2. fear of the natural environment such as: storms, water, or heights; 3. animal phobias such as: fear of dogs, snakes, insects, or mice; 4. blood-injection-injury phobia such as: fear of seeing blood or an injury, or of receiving an injection. (Wood 520 ... Researchers say social phobia may be caused by a small structure in the brain called the amygdala. The amygdala is a central site in the brain that controls fear responses. Animal studies are adding t...

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