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Ever wonder how physical sensations such as a racing heart give rise to fear? Using an adrenaline-like challenge during brain imaging we found that abnormal heart-brain communication contributes to increased fear in women with generalized anxiety disorder…ja.ma/3GmzcSH 
First, women with GAD showed a peripheral hypersensitivity to stimulation across all doses indicating that it took less adrenaline to make their hearts race than unaffected individuals… (2/n)
Second, the racing heart rates were accompanied by increased heartbeat sensations. But this difference happened only during a low level of stimulation… (3/n)
