OK, Guys, I got out my handy dandy anatomy and physiology from nursing school days.......I can`t find the muscle in question, I am seeing platysma, which originates in the fascia over deltoid and pectoralis major muscles, it insets at the mandible, muscles around angle of mouth, and skin of lower face. It`s action draws outer part of lower lip downward and backward, as if pouting, and depresses the mandible, connects with facial nerve 7.............that`s the closest i can find and it does run down the neck..............Dee