在日常生活中,多数人习惯于用右手活动,而习惯用左手活动的极少数人则被称为“左撇子”。左撇子通常被认为是一种生理缺陷,所以,父母和老师一旦发现孩子是左撇子,便要强令其改用右手。 用左手活动到底好不好?让我们先来看看大脑两个半球的心理功能专门化情况。从生理学角度讲,人脑分为左、右两半球,由一大束称为胼胝体的神经纤维联系着,使两半球合为一个整体,协调整个机体的活动。脑和躯体之间的神经联系是交叉支配的,左脑支配右半身的活动,右脑支配左半身的活动。左脑 In everyday life, most people are accustomed to using the right hand, while the handful of people who are accustomed to using their left hand are called “lefties.” Left-handed people are usually considered as a physical defect, so parents and teachers should be forced to switch to the right hand once they find that the child is left-handed. Left-hand activities in the end so good? Let us take a look at the two hemispheres of the brain specialization of the psychological function. Physiologically, the human brain is divided into left and right hemispheres by a large bundle of nerve fibers called the corpus callosum that links the two hemispheres together to coordinate the whole body’s activity. The neural connections between the brain and the body are cross-dominated. The left brain dominates the activities of the right half-body and the right brain dominates the activities of the left half-body. Left brain