编辑同志: 我教3岁的儿子写字时,他一会儿使用左手,一会儿使用右手,请问,这是为什么?我怕孩子是左撇子受人歧视,总是让他使用右手写字或干事情。这样做对吗? 合肥谈生谈生同志: 人的大脑分为左右两个半球,由一个称为胼胝的神经纤维联系着,使两半球合为一个整体,协调整体活动。脑和躯体之间的神经联系是交叉支配的,人 Edit comrades: I teach 3-year-old son when he uses the left hand for a while, while using the right hand, may I ask why is this? I am afraid that the child is left-handed subject to discrimination, always let him use the right hand to write or do things. Is it right to do so? Hefei Tan Shengsheng Comrades: The human brain is divided into two hemispheres, by a nerve fiber called the corpus callosum, so that the two hemispheres together as a whole, to coordinate the overall activities. The neural connections between the brain and the body are cross-over, human