Muscle Strain of the Upper Back (Trapezius Strain) is a stretching or tearing of the trapezius. This large muscle group spans the upper back, shoulders and neck. These muscles are commonly called the "trap" muscles.
Back
Muscle Strain of the Upper Back (Trapezius Strain) is a stretching or tearing of the trapezius. This large muscle group spans the upper back, shoulders and neck. These muscles are commonly called the "trap" muscles.