back muscle spasms cause
Video Transcript. In discussing back muscle spasms, it's important to remember that sometimes spasms of the muscle in the back is just a spasm of the muscle. When I say that, what I mean is muscles have their own intrinsic protective mechanisms. muscle spasm is the body's method of protecting injured structures, or as a means to protect itself from injury. Muscle spasms in the back can be caused by a muscle strain, a sprained muscle, or an underlying condition. 1  Tweet. 2  Print.