So, what caused this day-night rhythm in the heart? “Well, one thing is this local circadian clock, but what this paper shows is that there's something else, and that's the sympathetic nervous system, ...

For example, the sympathetic nervous system activates the "fight-or-flight" response in reaction to danger, concentrating energy on immediate survival and halting less urgent functions such as ...

In a tough conversation, it is easy to lose our cool, regret it and wonder what we could have done better. Consultant Cynthia ...

Following acute multiple trauma, hypothalamic stimulation of the sympathetic nervous system and adrenal glands causes an increase in circulating corticoids and catecholamines, or a stress response.

Heart Rate Increase in rate of contraction of cardiac muscle - cardiac output increases Decrease in rate of contraction of cardiac muscle - cardiac output decreases Breathing Rate Smooth muscle of ...