Musculus Trapezius is one of the major muscles located in the upper back and neck that spans across the spinal cord from the skull to the spine. It is responsible for the movement of the head and shoulders and is commonly referred to as the "traps" by fitness enthusiasts and athletes. Other synonyms for Musculus Trapezius include the trapezius muscle, the triangular muscle, and the descending part of the trapezius. Due to its location and size, the Musculus Trapezius is an essential muscle for maintaining good posture and preventing back and neck pain.