In most myopathies, weakness occurs primarily in the muscles of the shoulders, upper arms, thighs, and pelvis (proximal muscles). In some cases, the distal muscles of the hands and feet may be involved during the advanced stage of disease. Other typical symptoms of muscle disease include the following: 1  Aching. 2  Cramping.lthough symptoms depend on the type of myopath y, some generalizations can be made. Skeletal muscle weakness is the hallmark of most myopathies, with some noticeable exceptions, such as myotonia and paramyotonia congenita.
Quick Answer. There are approximately 470 known species of shark in the world, but it's impossible to count the exact number of individual sharks on the planet. World Wildlife Fund estimates that more than 100 million sharks are killed each year for their fins. Continue Reading.
A Chart Shows the Diversity of Shark Sizes. Sharks come in all sizes. The largest is the whale shark, which has been known to get as large as 18 meters (60 feet). The smallest fits in your hand. And the great white shark is somewhere in the middle. See photos and learn more about the wide diversity of sharks, read 5 reasons to revere sharks, and see even more articles about sharks. Tags: