In many countries, PAP machines are only available by prescription. A sleep study at an accredited sleep lab is usually necessary before treatment can start. This is because the pressure settings on the PAP machine must be tailored to a patient's treatment needs.
The pectoralis major muscle also performs internal rotation -- turning your arm in toward your body. This action, also called medial rotation, is important for reaching behind your back to tuck in your shirt and combing your hair on the opposite side of your head.
Video Transcript. Hi, I'm Michael Carson here to discuss with you what muscles do dumbbell pullovers work. Now, the pectoral major is the main muscle that is working when doing the dumbbell pullovers but you also get the pec minor.You get the latissimus dorsi, the larger muscle of the back, you get your teres major and your teres minor.ow, the pectoral major is the main muscle that is working when doing the dumbbell pullovers but you also get the pec minor. You get the latissimus dorsi, the larger muscle of the back, you get your teres major and your teres minor.