In Depth: Muscles. The major muscle in the chest is the pectoralis major. This large fan-shaped muscle stretches from the armpit up to the collarbone and down across the lower chest region on both sides of the chest. The two sides connect at the sternum, or breastbone.
Listen for bowel sounds for atleast 1 min in each quadrant and you should hear anywhere from 5-30 bowel sounds in each quadrant. If you don't hear anything or (0-4 bowel sounds) in a quadrant after 1 minute listen for a full 5 min. 0 to 4 bowel sounds heard in 5 min are called hypoactive Bowel sounds, more than 30 bowel sounds in a minute are called hyperactive... Hope this helps you ;--) May 14, '09.
So, here is an RT 101 coarse on how to listen to lung sounds. If I disagree with what you learned in RT, RN or DR school I apologize. But this is how you hear lung sounds. First, you listen to the apices while the patient is breathing normal. Many times, though, the patient could have the worse lung sounds and still sound clear in the front, so this should never be the only place you listen.