The idea of perimeter alludes to contour of a figure or surface . Cephalic , meanwhile, is that linked to the head (the upper region of the body, where the brain is located).
As can be seen from these definitions, the concept of head circunference refers to outline of the head . It is a measurement which is done in children , considering the distance that extends from the area above the ears and eyebrows to the back.
The process is carried out with a measuring tape . The tape should be placed over the ears and eyebrows and surround the entire contour of the head.
By measuring the head circumference, the pediatrician can analyze the developing of the infant. Each new data is compared with the previous measurements of the patient's head circumference and with the values considered normal according to the age and sex of the child.
The cephalic perimeter measurement, in short, is part of the routine checks of a child The doctor expects a certain increase of the head that, if not reflected in these checks, may reveal a possible disorder.
A smaller than normal head, for example, might reflect a slow growth or microcephaly . On the contrary, a head that is too large may be a sign of hydrocephalus .
It should be noted that the World Health Organization (WHO ) Create tables with the expected head circumference according to the age of the children. These data are taken as healthy patterns of child growth and serve pediatricians as standards.