Microvilli (singular: microvillus) are microscopic cellular membrane protrusions that increase the surface area of cells and minimize any increase in volume, and are involved in a wide variety of functions, including absorption, secretion, cellular adhesion, and mechanotransduction. 1 Locations.
Activities such as bending the knee, kicking or running can worsen the pain. The calf muscle, or gastrocnemius, aids in propelling you forward while walking or running. A strain at the upper end of the gastrocnemius causes pain in the back of the knee that worsens with knee bending or rising to your tiptoes. The popliteus muscle helps stabilize the knee joint during movement. Injury to this muscle can be challenging to diagnose.
Pain behind the knee aka posterior knee pain can be due to a number of problems. Sometimes is develops gradually over time indicating and underlying knee condition and other times it develops suddenly due to an injury.ome people complain of a general achy back of knee pain, others find their leg movements may be restricted by swelling or there may be a sharp pain at the back of the knee. Here we will look at the most common causes of pain behind the knee.