This is especially true if accompanied by the following symptoms: Sternocleidomastoid ... and innervates the upper trapezius ...

It is a rare condition that may result from injury or nerve damage ... which controls the rhomboid muscles the spinal accessory nerve, which controls the trapezius muscle the long thoracic ...

Trapezius pain is typically felt in ... on desk with poor posture for long hours or trauma or injury to the neck and shoulders. Symptoms Ache or sharp pain in the upper back, neck, and shoulders.