Every minute of the day and night we feel thousands of sensations that might trigger a positive emotion such as happiness, or a negative emotion such as sadness, or no emotion at all: a trace of perfume, a light touch, a fleeting shadow, a strain of music. And there are thousands of physiological responses, such as palpitations or sweating, that

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The nervous system and the hormonal stress response react to a stimulus in milliseconds, seconds, or minutes. The immune system takes parts of hours or days. It takes much longer than two minutes for immune cells to mobilize and respond to an invader, so it is unlikely that a single, even powerful, short-lived stress on the order of moments could

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Some studies are beginning to show that burnt-out patients may have not only psychological burnout, but also physiological burnout: a flattened cortisol response and inability to respond to any stress with even a slight burst of cortisol. In other words, chronic unrelenting stress can change the stress response itself. And it can change other... See more

By parsing these chemical intermediaries, we can begin to understand the biological underpinnings of how emotions affect diseases...

The same parts of the brain that control the stress response ... play an important role in susceptibility and resistance to inflammatory diseases such as arthritis. And since it is these parts of the brain that also

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