Anxiety, on the other hand, is more general and complex. It is felt in anticipation of danger, and is associated with the ability to predict, prepare for, and adapt to change. Often, it lasts a long time, and its cause remains ill-defined. For example, someone uneasy about public speaking may experience a tightness in the stomach for days before a scheduled talk. Thousands of scientific studies over the past several years show that high blood pressure, ulcers, migraine headaches, strokes, alcoholism, depression, anger, fatigue, drug addiction and many other medical conditions are often due to the long-term effects of stress. There's little doubt that all our thoughts and feelings are rooted in transmissions between nerve cells in the brain. These signals are passed from cell to cell by chemical neurotransmitters released at the synapse (tiny gap) between one cell and the next. Stress management techniques and meditation may help you to calm yourself and enhance the effects of therapy, although there is as yet no scientific evidence to support the value of these "wellness" approaches to recovery from anxiety disorders. There is preliminary evidence that aerobic exercise may be of value, and it is known that caffeine, illicit drugs, and even some over-the-counter cold medications can aggravate the symptoms of an anxiety disorder. Check with your physician or pharmacist before taking any additional medicines. It is not entirely clear why psychotropic medications work; yet, it appears that they reestablish balance within the chemistry of the brain. Behavior is determined through messages transmitted within the brain from one nerve cell to another through various chemicals. These chemicals are called neurotransmitters. Through the millions of nerve cells within the brain, chemicals trigger memories, sleep patterns, perceptions, feelings, moods and thoughts. The electric current that carries the messages are received by nerve ends, called synapses, which then release the neurotransmitter. These chemicals, in turn, propagate the message by stimulating the next nerves in line to send on the electrical message. Once used, the neurotransmitter chemical is returned and stored in the nerve end. This recycling process is called reuptake. When this signaling process goes askew, the effects are seen in a person's behavior and experienced in his emotions, perceptions, sensations, and ideas.
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