Some of the secondary reasons to perform testing include: to screen for hepatitis B infection in at-risk populations or in blood donors, to determine if someone is a carrier, to detect previous infection (with subsequent immunity), and to determine if immunity has developed due to vaccination.
Abdominal muscle spasm, also known as abdominal rigidity, is a powerful, involuntary contraction of the muscles of the abdomen.During a spasm, the muscle will feel stiff and tender if you apply pressure.ike any other muscles in the body, your abdominal muscles can have spasms that occur as a result of muscle strain during heavy use or overuse, fatigue, dehydration, and alcohol or drug use.
Causes of Back Muscle Spasms Video. Muscle spasms in the back can be caused by a muscle strain, a sprained muscle, or an underlying condition. Treatment for Back Pain Flare-Ups Video. Learn about treatments for low back pain, including proper methods for controlling inflammation, strength training, medications and more.he first step to getting to the bottom of what your back is telling you and to feeling better is to determine the cause of your back muscle spasm. Muscles spasms occur: 1  As a result of the muscles trying to protect themselves from a muscle strain or sprain or. 2  In response to an underlying condition.