The thoracic spine is part of your spinal column and is composed of 12 bones that are stacked one upon another. The thoracic spine is located between your cervical and lumbar spines, and it serves ...

Medically reviewed by Kashif J. Piracha, MD 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 ...