Studying the effect of Rheumatoid Arthritis (RA) on tendons. Tenosynovitis is one of the common features of rheumatoid arthritis in the hand. It affects both the extensor and flexor tendons, sometimes leading to granulomatous involvement and tendon rupture. The commonest sites of rupture are well known but the areas of more general tendon involvement are less understood.
exists and is an alternate of . The main process by which mountains form is through tectonic activity. When two tectonic plates collide, the crust is crumpled and pushed upwards to form mountains (as an analogy, imagine the effect of pushing a rug up against the wall).
Everest and the Himalayan mountains were once at the bottom of the sea but were formed when India crashed into Asia. It is pushing up into the Asian continent and Everest is now higher than then it was first climbed. Continental drift or tectonics created most mountains but some mountains have been formed by volcanic action.