After the Civil War , with the protection of the Thirteenth , Fourteenth , and Fifteenth Amendments to the Constitution and the Civil Rights Act of 1866 , African Americans enjoyed a period when they were allowed to vote , actively participate in the political process , acquire the land of former owners , seek their own employment , and use public ...
In the knee, for example, cracking or popping may occur if the patella (knee cap) is slightly out of alignment, and rubs on the adjacent tissues. Other causes of joint noise are the snapping of tendons or scar tissue over a prominence or something referred to as cavitation. Cavitation frequently occurs in synovial joints when a small vacuum forms in the synovial fluid and a rapid release produces a sharp popping or cracking sound.
One of the common causes of popliteal pain is a Baker's cyst (or popliteal cyst). This is a fluid-filled lump at the back of the knee caused by fluid which has built up under pressure within the knee cavity in response to an inflammatory problem within the knee and not directly related to the lump itself.njury to the posterior horn of the meniscus. Another cause of popliteal pain is a disruption at the back of the lateral meniscus, in the region known as the ' posterior horn '. The illustration on the left shows a bird's-eye view of the menisci sitting on the top of the tibia.