CT Brachial Plexus

What Is the Brachial Plexus?

The brachial plexus is a network of nerves that starts in the lower neck, passes near the collarbone and shoulder, and branches into the arm. These nerves carry movement and feeling signals to and from the shoulder, arm, and hand. When they are injured, pinched, or affected by a growth, it can cause pain, numbness, weakness, or changes in sensation.

How the CT Scan Is Performed

CT uses X-rays and a computer to create detailed cross-sectional images of the body. For a brachial plexus study, you lie on a scanning table while the machine rotates around you. You may be given a contrast dye through a vein to help outline blood vessels and certain tissues. The scan itself is quick and painless, though you must lie still and may be asked to hold your breath briefly.

Why Your Doctor Ordered It

Your doctor may order this scan to look for nerve damage after an injury, to check for pressure on the nerves from nearby structures, or to evaluate a lump or swelling in the neck, shoulder, or upper arm area. It can also help plan surgery or monitor a known problem.

What to Expect and How to Prepare

Preparation is usually simple. Tell your care team if you are pregnant, have kidney problems, or have had reactions to contrast dye, because contrast may be used. You may need to remove metal objects such as jewelry or hairpins. After the scan, you can typically return to normal activities right away.