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.
Most characteristic is groin pain, buttock and posterior pain can indicate a spine problem; thigh and anterior pain could be due to a soft-tissue disorder as well as the hip. There are two general kinds of knee problems: mechanical (e.g., from injury) and inflammatory (e.g., from arthritis).nee pain when kneeling on floor. Swelling between kneecap and skin. BAKER'S CYST: Pain and swelling at back of knee. If cyst ruptures, pain in back of knee can travel down the calf. DISLOCATION OF KNEECAP: Pain, tenderness and swelling of knee possibly resulting from sports injury.