Cool you brought this up, I just started a chapter on stress in my Psych class. I think its very true when you think of the possibility that your
personality causes you to behave certain ways that would predispose you to interact with your environment more or less, thereby causing some amount of
physical stress which could prompt illness or well-being. For example, the correllation between self-sacrificing people and arthritis could be due to
the fact that selfless people will go out of their way and commit to activities that were unplanned - more activity, less time for proper diet, weak
joints. Pretty general but you get the idea.
Then again, the amount of stress derived from a task is dependent on person's perception of the task and how it makes them feel. Example would be the
cardiovascular + lack of self esteem, where people are stressed more often creating a physiological response that produces more cortisol (chemical
that stimulates flight or flight) than would be considered normal or healthy, over exhausting their body and weakening their immune system due to the
body's overstimulation and need for recovery. In fact cortisol directly affects the immune system by suppressing it. Too many highs and lows and you
can see its like overcharging a battery and letting it die out - it shortens longevity, makes it weaker. Conversely, a person who has confidence and
see's a stressful situation as fun rather than demeaning won't produce so much cortisol and rather may produce more dopamine which is a stress
reliever!
There are lots of explanations one could think of. Although I think personalities can predispose one to certain illnesses, i wouldnt make the
assumption that personality traits are the cause.
edit: udderlyinsane has a good interpretation
edit on 20-10-2011 by asperetty because: (no reason given)