Any of the muscles that are under our voluntary control (skeletal muscles) can cramp. Cramps of the extremities, especially the legs and feet, and most particularly the calf (the classic  charley horse ), are very common.
Northern Europe includes Denmark, Finland, Greenland, Iceland, Norway, and Sweden. This area is known for harsher environments. It is generally cold, has poorly developed soils and limited mineral resources. This region has a population of over 25 million people.
The Nordic countries or the Nordic are a geographical and cultural region in Northern Europe and the North Atlantic, where they are most commonly known as Norden (literally the North). They consist of Denmark, Finland, Iceland, Norway and Sweden, including Greenland and Faroe Islandsâwhich are both constituent countries within the Kingdom of Denmarkâand the Ãland Islands.