Exercise-induced asthma is a condition of respiratory difficulty (bronchoconstriction) that is related to histamine release,is triggered by aerobic exercise, and lasts several minutes. Causes include medical conditions, environmental factors, and medications. The image below illustrates the pathogenesis of asthma.
A myelogram is an invasive diagnostic test that uses x-rays to examine the spinal canal. A special dye is injected into the spinal canal through a hollow needle. An x-ray fluoroscope then records the images formed by the dye. Myelograms can show conditions affecting the spinal cord and nerves within the spinal canal.
What is Myelomalacia? Myelomalacia is a condition in which the spinal cord softens. This softening is often the result of a lack of blood supply to the spine â due to an acute injury (sporting injury, car accident injury, etc.) or degeneration of the spine over time. When the spine softens, the nerves are put at an increased risk.