Precipitating factor for the occurrence of muscle spasm could be the lack of elasticity of the fibers, which in some cases may resolve by means of special physical exercises on stretching. One of the reasons why that state comes, experts believe fatigue. Special processes of the nervous system (alpha motor neurons) control the involuntary contractions of the muscles and reflexes of man. Them from the cortex and from the dorsal division of his commands come in the form of electrical impulses, if necessary, creating a reflex contraction of the muscles. This reflex is a way of protecting the body from the load.
During the state of fatigue of alpha-motoneurons continue to operate, but the pulse comes only to muscle, not the tendon. From a large number of pulses, the muscle tenses, because he can't pass them on from fatigue. Thus, the vessels are pressed into the swollen muscle fibers and therefore do not leak blood. In this area the spasm occurs anoxia and increased pressure on some nerves, resulting in pain appear.
Profuse sweating of the body can also lead to muscle spasms. This is due to the loss along with then a large number of minerals, resulting in disrupted the usual balance between potassium, magnesium, sodium and calcium. These trace elements contribute to the timely transmission of impulses from the brain to their destination, and their significant losses disrupt this process, causing and reduces muscle.
Also problems in the circulatory system, spine (osteochondrosis) or nerves very often provoke spasms in the muscles. Violation of metabolism, hormonal changes, monotonous diet, and taking certain medicines can also become one of the causes of muscle spasm.
Shortage of some vitamins (B1, B5 and B6) influencing the process of transmission of nerve impulses in the human body may appear unpleasant symptoms such as spasms and painful tension in the muscles.