The trapezius is a large muscle in the upper back that helps to control the shoulder blade (scapula) and stabilize the spine. Trapezius palsy happens when a nerve (spinal accessory nerve) that connects the spinal cord to the trapezius muscle becomes damaged. This causes pain and weakness in the back of the shoulder and the upper back. This also limits the range of motion of the shoulder joint. Damage to the spinal accessory nerve usually happens because of an injury to the back or shoulder.
Trapezius palsy is often associated with bones moving out of place (subluxation). This can happen to the joint in the shoulder where the collarbone (clavicle) meets the scapula (acromioclavicular subluxation) or to the joint where the clavicle meets the
…show more content…
• MRI.
TREATMENT
This condition is treated by resting and icing the injured area, and by doing physical therapy exercises. Depending on the severity of your condition, treatment may also include:
• Keeping your shoulder in place (immobilization) for a period of time. This may be done using:
○ A shoulder sling to support the weight of your arm.
○ A shoulder brace.
• Over-the-counter or prescription medicines that help to relieve pain and inflammation.
• Ultrasound. This uses sound waves to make a picture of your injured area.
• Transcutaneous electronic nerve stimulation (TENS). This uses an electric current to activate the nerves.
• Surgery (rare).
HOME CARE INSTRUCTIONS
If You Have a Brace or a Sling:
• Wear it as told by your health care provider. Remove it only as told by your health care provider.
• Loosen the brace or sling if your fingers become numb and tingle, or if they turn cold and blue.
• Do not let your brace or sling get wet if it is not waterproof.
• Keep the brace or sling clean.
Bathing
• If you have a brace or a sling, do not take baths, swim, or use a hot tub until your health care provider approves. Ask your health care provider if you can take showers. You may only be allowed to take sponge baths for