If the virus becomes active after being latent, it causes the disorder known as shingles, or herpes zoster. The virus spreads in the ganglion and to the nerves connecting to it. Nerves most often affected are those in the face or the trunk. The virus can also spread to the spinal cord and into the bloodstream.
About this Procedure. The sniff test is a fluoroscopic exam used to check how the diaphragm (the muscle that controls breathing) moves during activities such as breathing normally and inhaling rapidly. Your diaphragm normally moves down when you inhale, and up when you exhale.
A chest x ray is a painless, noninvasive test that creates pictures of the structures inside your chest, such as your heart, lungs, and blood vessels. Noninvasive means that no surgery is done and no instruments are inserted into your body. chest x ray takes pictures of the inside of your chest. The different tissues in your chest absorb different amounts of radiation. Your ribs and spine are bony and absorb radiation well.