Its action is described as being complementary to that of the sympathetic nervous system, which is responsible for stimulating activities associated with the fight-or-flight response. Nerve fibres of the parasympathetic nervous system arise from the central nervous system. Specific nerves include several cranial nerves, specifically the oculomotor nerve, facial nerve, glossopharyngeal nerve, and vagus nerve. Three spinal nerves in the sacrum (S2-4) also act as parasympathetic nerves.
A healthy BMI is considered to be between 18.5 and 24.9. Based on these BMI tables, the National Heart, Lung and Blood Institute suggests that a healthy weight range for women who are 5 feet 4 inches tall is 110 to 140 pounds.
As a matter of fact, the calculation of BMI - body mass index for both women and men is carried out according to the same BMI formula. In the majority of sources the values of BMI between 18.5 and 25 are considered as an indication of normal weight both for women and men. However, the values of BMI for normal weight range and general conception of ideal weight itself vary from time to time and country to country. In 1985 the National Institutes of Health (NIH) consensus conference suggested that overweight BMI were considered at a BMI of 27.8 for men and 27.3 for women.