In mathematics, a coefficient is a multiplicative factor in some term of a polynomial, a series or any expression; it is usually a number, but may be any expression. In the latter case, the variables appearing in the coefficients are often called parameters, and must be clearly distinguished from the other variables. For example, in.
Vasovagal syncope is a common cause of fainting. The vagus nerve is overstimulated and causes the body's blood vessels to dilate and the heart to slow down. This anti-adrenaline effect decreases the ability of the heart to pump blood upward to the brain against gravity. Without blood flow, the brain turns off.
People faint at the sight of blood. Parents faint when their kids get immunized. Older people faint in church. Many types of emotional and physical stressors can stimulate the vagus nerve to do damage. But on occasion, the cause of the faint is not vasovagal syncope but something more serious. Encouraging the person to seek medical care or calling 911 may save a life. While it may be an inconvenience or sometimes an embarrassment to a patient, being unconscious is not normal.