Does anybody know whether there are any research why certain emotion cause certain physical reaction in different body parts? For example:

  1. Nervousness would make your stomach churned
  2. A degree of surprise would make your knee rubbery or hands cold
  3. A panic attack would stop your breath for a while
  4. A sadness would make something inside your left chest painfull and bring tears to your eyes
  5. Helplessnes and despair could make you tongue tied
  6. Embarrasment/anger would make blood flow faster to your face
  7. Arousal would make blood flow faster to….(self censored)

I understand that feelings are triggered by comprehension and memory of a situation. These two intangible things conjured by our brain must have created sensation being sent by nerves to certain particular body parts and caused certain kind of different physical reaction. And a constant physical reaction must be the one who triggered a physical illness or (in another case) create physical change towards somebody. For example:

  1. Constant unmanageable stress could cause high blood pressure or even stroke
  2. (In another case) manageable stress could cause more productivity
  3. Some say that happiness and being positive will make you look younger
  4. On the other hand, sadness can make you look prematurely older

Anybody aware of any publicized research on this matter? I would like to know the clinical reason of terms (say) heart broken. I want to comprehend by the feeling of loosing somebody who we love can create pain so deeply to something inside your left chest. Let say to your heart. I want to understand the logical reason why suddenly your heart could feel as if somebody squeezed it so hard and it even cause tears to your eyes. Why suddenly you could feel that there’s long cold knife piercing through it, twisting in it, creating the feeling of hurt and inflicting pain beyond recognition. It could be so painful and unbearable it could make a person feel so despair and helpless to an extreme point where one could decide to take their own life (or even the life of their children). Why? Anybody can help me?

Disclaimer: There must be a more appropriate psychological jargons but being a psychologist wanna be, I will go with what I have.