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.
A chin strap, as the name indicates, wraps around the back of the head and secures the chin. This prevents the lower jaw from growing at the same rate as the upper jaw. This allows the upper jaw and the upper teeth to overlap the lower teeth. Insert an expander into the mouth.An expander widens the upper jaw with a metal bar. The metal bar attaches between the bicuspid and the first molar in the mouth.his prevents the lower jaw from growing at the same rate as the upper jaw. This allows the upper jaw and the upper teeth to overlap the lower teeth. Insert an expander into the mouth.