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 Anxiety
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Anxiety is often described as having cognitive, somatic, emotional and behavioral components (Seligman, Walker & Rosenhan, 2001). The cognitive component entails expectation of a diffuse and uncertain danger. Somatically the body prepares the organism to deal with threat (known as an emergency reaction); blood pressure and heart rate are increased, sweating is increased, bloodflow to the major muscle groups is increased, and immune and digestive system functions are inhibited.
A chronically recurring case of anxiety that has a serious effect on a person's life may be clinically diagnosed as an anxiety disorder. The most common are generalized anxiety disorder, panic disorder, social anxiety disorder, phobias, obsessive-compulsive disorder, and posttraumatic stress disorder (PTSD).
In the US: Panic disorder has a lifetime prevalence of 1.5-3.5%. One third to one half of these individuals also have agoraphobia. Major depressive disorder occurs frequently (50-65%) in individuals with panic disorder. In contrast, phobic disorders have a lifetime prevalence as high as 10-13%, but they encompass several subcategories of anxiety conditions. Many of these are underreported due to mild subclinical presentations. The 1-year prevalence of generalized anxiety disorder (GAD) is approximately 3%, with a lifetime prevalence of 5%.
Although anxiety and panic attacks are related to fear, it is not the same thing. Fear is a direct, focused response to a specific event or object, and the person is consciously aware of it. Most people will feel fear if someone points a loaded gun at them or if they see a tornado forming on the horizon. They also will recognize that they are afraid. Anxiety, on the other hand, is often unfocused, vague, and hard to pin down to a specific cause. In this form it is called free-floating anxiety. Sometimes anxiety being experienced in the present may stem from an event or person that produced pain and fear in the past, but the anxious individual is not consciously aware of the original source of the feeling. It is anxiety's aspect of remoteness that makes it hard for people to compare their experiences of it. Whereas most people will be fearful in physically dangerous situations, and can agree that fear is an appropriate response in the presence of danger, anxiety is often triggered by objects or events that are unique and specific to an individual. An individual might be anxious because of a unique meaning or memory being stimulated by present circumstances, not because of some immediate danger. Another individual looking at the anxious person from the outside may be truly puzzled as to the reason for the person's anxiety.
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