The trapezius muscle is a large diamond shaped muscle in you mid/upper back and neck. This muscle is one of the most common sites where trigger points can form. This muscle originates on the Nuchal ligament and the spinous processes of C6-T12. It inserts on the spine of the scapula, the acromion process, and the distal clavicle. The upper fibres elevate the shoulder and rotate the glenoid fossa (shoulder socket) upward. The lower fibres assist this motion as well as help depress the shoulder. The middle fibres of this muscle strongly adduct the scapula. This muscle is susceptible to postural overload such as sitting at desk all day. Trigger points on the lateral upper edge refer into the lateral neck and temples, causing “tension neck ache”as well as headache pain.Trigger points in the middle and lower fibres refer pain into the posterior neck and shoulder.