Newborns' adaptation to the changed environment mainly depends on the instinctive activities realized at the lower level of the central nervous system, that is, unconditional reflex (also called congenital reflex).

Unconditional reflex of newborn mainly includes sucking reflex, rooting reflex, blinking reflex, moro reflex, grasping reflex, Babinsky reflex, jumping reflex, fencing reflex, stepping reflex, swimming reflex, Babkin reflex and curling reflex.

1. Sucking reflex touches children's lips, causing sucking action. Sucking reflex is one of the strongest reflexes. When the newborn starts sucking, other activities will be inhibited. Permanent, good for feeding.

2. defense reflex In the first few days after birth, children can have a systemic response to temperature stimuli or pain stimuli (one stimulus, systemic response).

3. Directional reflection is also called inquiry reflection, that is, reflection on "what is this". Shortly after birth, in about two weeks, children can produce directional reflection to strong stimuli (such as strong light or loud voice) (such as turning their eyes to the light source or temporarily stopping sucking).

The above-mentioned unconditional reflexes have biological significance related to life adaptation. Some unconditional reflexes have no obvious biological significance, but they may have had some biological adaptation significance in the process of human evolution.

4. grasping reflex, also known as Darwinian reflex, will hold on to any object when it comes into contact with the palm of your hand, and even hang your body with the help of the object. About the second month, this reflection disappeared.