The foundation of intellectual development is the brain. The newborn brain weighs about 390g, accounting for 8% of the birth weight, while the adult brain weighs about 1400g, accounting for only 4% of the body weight. It can be seen that the brain weight of newborns is close to that of adults1/3; At the age of 2, the infant's brain weighs about 900~ 1000g, accounting for 75% of adults; By the age of 7, the baby's brain weight is close to that of adults, reaching 1350 ~ 1400 g.
Therefore, in the first two years of life, the brain develops fastest. With the differentiation and volume increase of nerve cells, the number and length of synapses increase, the myelination of nerve fibers, the construction of nerve pathways and the function of brain increase, children's psychology and behavior become more and more mature, which is manifested in the development of children's language expression, motor correctness and coordination, the strengthening of comprehensive ability of inhibition and analysis, the gradual stabilization of emotions, the formation of personality characteristics and the development of social adaptability.
How old are the children?
Children's age generally refers to the age of infancy, and children aged 1-3 are usually divided into infancy according to their physiological characteristics. Childhood is characterized by slow growth, but the structure and function of the cerebral cortex continue to mature and develop, the intellectual development accelerates, and the weight of the brain continues to increase. Secondly, language, thinking and social skills are developing obviously. They are curious about the outside world, like to imitate, have empathy and trust, and can distinguish good from bad under the correct guidance.
The focus of infant health care is to cultivate children's good eating habits and hygiene habits, ensure the supply of nutrition, and prevent accidents and infectious diseases.