Outline of shoulder showing parts of shoulder joint: acromion, coracoid process, coracoacromial ligament, subacromial space with bursa inside, clavicle (collarbone), scapula (shoulder blade), long head of biceps tendon, and supraspinatus (muscle and tendon that help form rotator cuff).
Upper trapezius Trigger Point #1 is the most common TrP in the body. It refers classically in a question mark pattern up the back side of the neck to the skull then around behind the ear to the temples. It can extend into the eye. It can also be included in TMJ pains when it refers to the angle of the jaw. Interesting is occasional symptoms of dizziness!
The two shoulders are located beneath the head connecting the arm and the chest. Each shoulder consists of 2 bones, the clavicle and the scapula, and collectively both shoulders account for 4 bones in the body. http://www.learnbones.com/shoulder-bones-anatomy/