The New York Times: “Understanding the Anxious Mind” – Newton Street Study Guide to the brain
Mar 07 2012

The New York Times: "Understanding the Anxious Mind"

Anxiety is the most common mental illness in America, affecting an estimated 40 million adults reports this NYT article. Why do some feel anxious while others do not? A hyperactive amygdala and higher levels of the stress hormones cortisol and norepinephrine create physiological differences between the anxious and non anxious. But, as the story unfolds it is clear that there is more to understand.
see also:

Scientific American: Factoring Fear: What Scares Us and Why

for different takes on these ideas:

NYT: The Other Brain Also Deals With Many Woes
Scientific American: Think Twice: How the Gut’s “Second Brain” Influences Mood and Well-Being

How can you reduce anxiety? Recent research from Stanford and Brown Universities suggests that we can manage pain, anxiety and depression through simple breathing techniques. see here In this video, USF researcher Dr Martin Rossman explains the skill of modulating anxiety and worry through mind body training.