The diaphragm is a dome-shaped muscle that separates the chest from the abdomen. This muscle, also called the thoracic diaphragm, is the main muscle used for breathing and is also involved in other ...

Your diaphragm is a thin muscle that separates your chest and abdomen. When you inhale, your diaphragm tightens and expands your chest cavity. A paralyzed diaphragm doesn’t tighten as it should when ...