Idiopathic leg cramps. Although the cause of idiopathic leg cramps is unknown, there are a number of theories about what might cause idiopathic leg cramps. These include: 1  abnormal nerve activity during sleep which causes the muscle of the leg to cramp.
Constructed by the German Democratic Republic (GDR, East Germany), starting on 13 August 1961, the wall completely cut off (by land) West Berlin from surrounding East Germany and from East Berlin until it was opened in November 1989.est Berliners initially could not visit East Berlin or East Germany at all-all crossing points were closed to them between 26 August 1961 and 17 December 1963. In 1963, negotiations between East and West resulted in a limited possibility for visits during the Christmas season that year (Passierscheinregelung).
When the Berlin Wall was opened on November 9, 1989 it marked for many the symbolic end of that war. Back to The Cold War Chronology To find the cause of the fall of the Berlin Wall, one must look, not in Germany, but in the Soviet Union.The change began when Mikhail Gorbachev came to power in the Soviet Union in 1985.hen the Berlin Wall was opened on November 9, 1989 it marked for many the symbolic end of that war. Back to The Cold War Chronology To find the cause of the fall of the Berlin Wall, one must look, not in Germany, but in the Soviet Union. The change began when Mikhail Gorbachev came to power in the Soviet Union in 1985.