diaphragm. 1  the partition of muscles and tendons that separates the chest cavity from the abdominal cavity; midriff. 2  any membrane or partition that separates one thing from another. 3  a dividing wall at the node of a plant stem. 4  a device to regulate the amount of light entering the lens of a camera, microscope, etc. (anatomy) In mammals, a sheet of muscle separating the thorax from the abdomen, contracted and relaxed in respiration to draw air into and expel air from the lungs; also called thoracic diaphragm. ( 2 anatomy) Any of various membranes or sheets of muscle or ligament which separate one cavity from another.
Treating back pain often involves the expertise of several different kinds of medical specialists, depending on the cause and severity of your back pain. You may start by seeing your own primary care doctor for an initial assessment. Your primary care doctor may then refer you to specialists including:
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