Things to remember. 1  Myasthenia gravis is an autoimmune disease that causes muscle weakness. 2  The symptoms are caused by the immune system interfering with the transmission of messages from the nervous system to the muscles. 3  There is no cure, but the symptoms can be managed.
Lake Nipigon is the largest inland lake in Ontario. Only the Great Lakes are larger. Lake of the Woods is actually 11% smaller even though it has a reputation for being the largest. Lake Nipigon consists of 2802 miles 2 (4510 km 2) of pristine water and dotted with hundreds of islands.
Sponsored Topics. Grayling ( /É¡reÉªlÉªÅ/) is a city in the U.S. state of Michigan and the county seat of Crawford County. The population was 1,952 at the 2000 census. Grayling takes its name from the Grayling fish that was once prevalent in its lakes and streams. Grayling is situated within Grayling Township, though it is politically independent. It is located in the middle of Northern Michigan. The highways make it the natural 'gateway' to much of up north, as locals and many visitors would call it.