My smile is a tonic with my parents

The smile of a child not only warms the mother's heart but also as a natural stimulant to promote the mother's mood.

A new study has found that infant smiles lighten up the same brain responses to drinks and stimulants, bringing a sense of comfort. The results elucidate the special link between mother and child and explain why a child's smile is like a tonic for stressed and insomnia parents.

Dr. Lane Strathearn at Texas Children's Hospital, USA, said the baby's smile triggered the brain region to handle the feeling of pleasure and reward. These brain regions are involved in the neurotransmitter dopamine.

"It can be seen that your child's smile is a kind of natural excitement," he said.

(Photos: fingers-to-toes)

Scientists took brains of 28 mothers who gave birth for the first time, with babies 5 to 10 months old. They asked these women to take pictures of their children and other children. In some pictures, babies are smiling, in other pictures babies are sad or do not show any emotion. Meanwhile, the machine will record blood flow in the brain and reveal which areas of the brain are most active.

The results showed that when mothers looked at photos of their children, the brain region associated with dopamine chemicals glowed. The level of glow depends on the baby's emotions. The smiling face creates the strongest reaction, while the sad and emotionless face creates the least reaction.

The researchers found that the results help explain the special bond between mother and child. The relationship between mother and child is essential to the development of the child. Indifference or harshness will also lead to bad consequences for children.