The U.S. is widely considered the bastion of capitalism, and large parts of Scandinavia and Western Europe are considered socialist democracies. However, the truth is every developed country has some programs that are socialist. An extreme form of socialism is communism.
1 A sprain is abnormal stretching or tearing of a ligament that supports a joint. 2  A strain is abnormal stretching or tearing of a muscle or tendon. 3  Sprains and strains may be caused by repetitive activities or by a single event.
Strain etiology, assessment, and grading. Strains, pulls, tears, and ruptures are different names that describe the same muscle injuryâthe only difference is in the degree of injury sustained. A strain or pull is less serious than a tear or rupture. To keep it simple, the term strains will be used from this point forward.