Iceland Flag and Description. The flag of Iceland was officially adopted on June 19, 1915. The cross design is modeled after the Danish flag. The color red is said to symbolize the island's active volcanoes; white the ice and snow that covers most of the country, and blue is symbolic of the surrounding Atlantic Ocean.
Rigidity, or resistance to movement, affects most patients and usually begins in the legs or neck. The affected muscles will remain tense and contracted, and some patients may feel pain as well as stiffness. Attempting to move the limb of a patient in Rigidity may lead to short, jerky movements called 'cog-wheeling'.
An eccentric motion is one in which a muscle is lengthened during contraction. In terms of a squat, the eccentric movement occurs in the downward phase of the squat motion as you control the movement. During that phase, the muscles in the legs are lengthening to slow the pace of descent.An analogy is lowering a bucket attached to a rope through a pulley. concentric contraction is one in which the muscle length decreases to perform a movement. In a squat, this would be the lifting phase of the squat as you stand back up. Looking at the rope analogy again, a concentric movement would be similar to pulling a rope attached to a boulder.