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.
Purpose. Your trapezius maintains tension and posture in your cervical and upper thoracic spine, or your upper back and the base of your neck. Your trapezius also works to pull your shoulder blades up, such as when you shrug. The lower portion of your trapezius helps pull your shoulder blades back with the assistance of smaller muscles, such as the rhomboids, which lie below your lower trapezius. Your trapezius works in conjunction with your spinal erectors to control the alignment of your spinal column.