Fashion, Food & Fun. What's more fun than shopping, food & friends? Check out our new style blog series with fashion tips, lifestyle trends and much more. Now through December 31, 2017.
Trapezius Muscle. The trapezius is one of the major muscles of the back and is responsible for moving, rotating, and stabilizing the scapula (shoulder blade) and extending the head at the neck. It is a wide, flat, superficial muscle that covers most of the upper back and the posterior of the neck.
Causes. Trapezius muscle spasms typically occur when the trapezius muscle is torn, stretched or strained. This can occur from an unexpected fall, from lifting heavy objects frequently, twisting while lifting something, or an abrupt movement that strains the trapezius muscle.rapezius muscle spasms can be painful and debilitating. Photo Credit Pixland/Pixland/Getty Images. The trapezius muscle is a large muscle located at the base of the neck, running down to the shoulder blades. A variety of conditions and actions can cause this muscle to spasm, some that require the attention of a doctor.