哺乳动物脑的正常发育和功能维持依赖于环境,依赖于感觉经验。由于发育期的脑具有高度可塑性,出生后早期的环境对脑的正常发育尤其重要。这一结论得到了从正反两方面的实验研究的支持。一类是有关感觉剥夺对脑影响的研究,例如在视觉系统用缝合幼猫的眼睑的方法证实发育期剥夺视觉刺激会妨碍大脑皮层视觉神经元的分化和眼优势的形成,从而造成视知觉障碍,感觉剥夺如发生在出生后不久的关键期内,其后果是不可逆的。另一类研究观察富有刺激的环境 The normal development and function of the mammalian brain depend on the environment and depend on sensory experience. Due to the high plasticity of the developing brain, the early postnatal environment is of particular importance for normal brain development. This conclusion has been supported by both positive and negative experimental studies. One is the study on the effect of sensory deprivation on the brain. For example, in the visual system, the method of stitching the eyelid of a young cat confirms that deprivation of visual stimuli in developmental period hinders the differentiation of the visual neurons and formation of ocular dominance in the cerebral cortex, resulting in visual impairment , Feeling deprived of it as occurring shortly after birth in the critical period, the consequences are irreversible. Another type of study observes a stimulating environment