Medical prefix: A prefix employed in medical terminology. Medical words are often put together, cobbled from two or more building blocks. Among these building blocks are the prefixes. Examples of prefixes used in medicine include: a-: Prefix much employed in the health sciences indicating not, without, -less as, for examples, in alexia (not read), aphagia (not eat), aphonia (not voice, voiceless).
Fibers of the middle (medial) segment of the trapezius cause an upward rotation of the scapula and this helps to elevate the arm. The medial fibers of the trapezius help squeeze the scapula together, and this is the region that is most active in the chest expander exercise.he expanders should begin in front of your torso. Raise your arms and forearms until they are parallel to the floor and maintain this arm height throughout the exercise. 2. Begin with your elbows pointing outward and with your palms facing each other and your hands at the level of your sternum.
The trap muscles are the only muscles which can lift the outside of your shoulders to create a âshrugâ. They move the head and neck toward the shoulder of the other side. The middle of the muscles pull the shoulder blades together, while the lower draw the shoulder blades downward. And remember to do your trap stretches. 2  Breastfeeding a baby with your shoulders hunched forward and the weight of the baby in your arms can cause trapezius muscle pain. 3  Check your posture and bring your shoulders back. 4  Do side-lying whenever possible.