Sucking - physiological act, which is based on a complex congenital unconditional food reflex. The act of sucking as unconditional reflex (see) in the "pure form" takes place only during the first hours after birth, as soon takes place the complication of the nervous regulation (see Conditional reflexes). In the covering and compacting the newborn breast nipple participate lips, transverse crease on them, thick cushion along the maxillary processes, fatty lumps (lumps Bandage) cheeks. Compression of the nipple or areola relaxes sphincter milk ducts, lengthening and flattening of the nipple. Subsequent movements of the tongue and lower jaw newborn create negative pressure in the mouth, and milk enters the mouth of the child and after a few suckles proglatavetsa.
Immediately after birth, the baby produces spontaneous movement of the lips, jaw and tongue, which reflect the stimulation of the nervous system associated with the newly occurred act of birth. A day later the child is looking for chest: turn the head, krivit lips, and then pulling the lips and tongue and makes sucking motion. To the 3 - 4th day life sucking becomes clear and rhythmic. The child is able to simultaneously sucking, breathing and swallowing. Start sucking leads to a delay of breath, then thoracic breathing is ordered by the rhythm and increases the amplitude respectively rhythm sucking movements. Diaphragmatic breathing shut down at all, and in subsequent turns out to be inhibited for a long time after cessation of breastfeeding. This provides the best conditions for the passage of food.
Active sucking is an indicator of the health of the child, as even relatively minor illnesses child sucks sluggish. Serious disease of the newborn (birth trauma, pneumonia, sepsis and other) are accompanied by the refusal of the chest; sometimes children can't suck even nipple. Cm. also Feeding the children.