What is one function of the upper trapezius muscle?

The upper trapezius muscle primarily functions to elevate the scapula. This action is vital for various shoulder movements, including shrugging the shoulders and assisting in lifting the arms overhead. When the upper trapezius contracts, it pulls the scapula upward, which contributes to the overall stability and mobility of the shoulder girdle.

In addition to elevation, the upper trapezius assists in upward rotation of the scapula during overhead arm movements, which aids in maintaining proper biomechanics of the shoulder joint. Understanding the function of the upper trapezius is crucial for rehabilitation, strength training, and addressing postural issues commonly encountered in clinical practice.