Spasm means "uncontrolled muscle contraction". Muscle tone is a healthy form of involuntary sustained "partial" contraction. The calcium ions trigger powerful muscle contraction aided by ATP molecules. This acts as the molecular drive that causes muscle contraction. The discs are responsible mainly for force transmission during muscle contraction. It is straightforward to obtain quantitative expressions for time dilation and length contraction. This leads to the actual contraction of the muscle. This approach is in accordance with the following mechanism of muscle contraction. Bruxism can also be regarded as a disorder of repetitive, unconscious contraction of muscles. RMS has three testable parameters with respect to length contraction and time dilation. Slight hyperthermia results in increasing HR and strength of contraction. Sympathetic nerves also influence the force of heart contraction. It is composed of myogenic muscular tissue associated with heart contraction features. It was the collapse of international liquidity that caused of the contraction of trade. The ectopic beat is typically a premature ventricular contraction (PVC).