kindly please explain to me the expressions between brackets?

Question

1-laugher is a story or situation that we anticipate will be funnycreates the rising level of tension reflects in pulse, skin tempriture........(this tension is suddenly released in muscular contractions with the punch line.)
2- we work with people to help them to release the child withinfor we find that rigid persons can't let themselves play are the ones who have the hardest time healing or chaning their livesto deal with illness. (there are individuals who have play assigned to them in order not to feel guilty playing )

both paragraphs are out of a book about alternative therapy and cancer

Answer 1

........(this tension is suddenly released in muscular contractions with the punch line.)
meaning that the physical reaction of laughter allows even those that can't naturally release their personal tensions and stress in a regular healthy maner, can do so when they laugh, therefore implying that laughter will relieve stress and thus help the body

(there are individuals who have play assigned to them in order not to feel guilty playing )
similar to the first, implying that some people do not allow themselves to release tension and stresses( of everyday, or situational like terminal illness) on their own, and when they do attempt to "have fun" they are still under those same pressures and stresses, unable to give their body the rest (from stress) it would otherwise benefit from.

many studies of stress conclude that stress has unhealthy effects on our body's, it causes hormones, chemical reactions that damage, or increase the aging processes in harmful ways, ultimately high stress brings about shorter life spans

Answer 2

usually brackets are used to tell information about a small part such as a word in a sentence (the "brackets" are called parenthesis pronounced perentaseez.). basically they are just side comments also.

hope that helped.
tyler

Answer 3

1. laughter as tension release

2. people who are patients who are assigned play therapy as part of their treatment

hope that helps.

Answer 4

The information in the parenthesis just explains the information further, that's all.