11.1 Describe the roles of agonists, antagonists and synergists Symptoms [edit | edit source]. Flexor Digitorum Superficialis. Orbicularis oris muscle. Action: retracts and rotates scapula. Multidirectional neck strength and electromyographic activity for ... Lift your lower lip up … 55 and over rentals communities in jacksonville, fl; target linen curtains. Copy. The sternocleidomastoid muscles help to flex the neck. This is called antagonistic muscle action. The name sternocleidomastoid breaks down into root words that describe the location of the muscle. The first part of the word, sterno, comes from the Latin word “sternon” which relates to the sternum (the breastbone). The second part of the word, cleido, means clavicle, which is the collarbone. Agonist and antagonist muscle pairs What … Human Anatomy & Physiology. The external intercostals, internal intercostals, and innermost … The main action of zygomaticus major is to pull the angle of the mouth superolaterally. They aid in the stabilization of the upper body and the facilitation of breathing. Muscle synergists We describe muscles that work together to create a movement as synergists. Es benötigt immer eine Kombination aus beiden, da sich ein Muskel nicht mehr selbst dehnen kann, sobald er sich zusammengezogen hat. antagonist synergist