It is often used to examine the brain or spine, although it is commonly used for diagnosing subtle injuries to joints. Muscle - Body tissue, consisting of long cells, muscles allow movement as they contract when stimulated. Striated muscles are under voluntary control and include most of the muscles of the body. Muscle Cramp - Almost any physical activity can result in muscle cramps. A muscle can cramp when it's already in its most shortened position, and it then contracts.
Many people get cramps in their legs.
Other causes of cramps include low blood sugar, dehydration, and overexertion. Musculoskeletal system - The bones and muscles in the body together form this system. Overtraining - A condition that results from undertaking more physical activity than your body can reasonably do. Symptoms include fatigue, pain, loss of appetite, and more. Treatment is to rest.