Image-Guided Surgery - Overview. 1  Image-guided surgery (IGS) is the use of a real-time correlation of the operative field to a preoperative imaging data set that reflects the precise location of a selected surgical instrument to the surrounding anatomic structures. Although first developed for neurosurgery, endoscopic sinus surgery (ESS) rapidly became one of the leading indi...
Like most other muscles, there are two trapezius muscles â a left and a right trapezius â that are symmetrical and meet at the vertebral column. The trapezius arises from ligaments at its origins along the nuchal crest of the occipital bone and the spinous processes of the cervical and thoracic vertebrae....
The trapezius stabilizes and secures the shoulder blade at the thorax and fulfills numerous tasks. It moves the shoulder blade medially and rotates it outward. In addition, the descending part causes elevation of the scapula while the ascending part depresses this bone.