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左脑和右脑功能的不对称性从笛卡儿提出“心是一个,大脑为何是两个”这一问题以来,世界各国专家对大脑的研究始终没有停止过,理论和假说,不一而足,可谓智者见曾,仁者见仁。人类对大脑的认识始于16世纪。解剖生理学和神经生理学研究最早的成果表明,人的大脑左右两半球呈镜面对称,通过由大约2亿束神经纤维组成的胼服体进行频繁的信息交换。左右两部分神经呈交叉状,大脑左右两半各将相反一侧半身置于自己的管辖之下,躯体和四肢运动是由对侧大脑半球的运动区指挥的。在日常生活中,我们常常会发现,左脑受到损害比右脑受到损害表现出更为严重的症状。如脑溢血患者,其在左脑出血时较之右脑出血时更易表现出丧失言语能力和神智模糊。这就清楚地表明大脑左右两半球在功能上是不同的。但是这种不同究竞表现在哪些方面,当时人们对此仍存有疑惑,不能解释清楚。20世纪50年代,美国加利神尼亚技术研究院R·W·斯佩里博士和他的学生龙·迈尔斯开始在动物身上进行裂脑实验研究。当他们切断猫和猴子的两半球之间的全部联系时,吃惊地发现这些动物仍然很正常;更令人兴奋的是,
Asymmetry in left and right brain functions Since Descartes put forward the question “why is one heart and why two are?”, The study of the brain by experts from all over the world has never ceased. Theories and hypotheses do not stop Once upon a time, it can be said that wise men see once, benevolent see benevolence. Human understanding of the brain began in the 16th century. An earliest study of anatomical and neurophysiological studies showed that the left and right hemispheres of a person’s brain are mirror-symmetric and communicate frequently through the corpus callosum, which consists of about 200 million nerve fibers. About two parts of the nerve was cross-shaped, left and right halves of the brain will be placed on the opposite side of their body half under the jurisdiction of the body and limb movement is contralateral cerebral hemisphere exercise area command. In our daily life we often find that damage to the left brain shows more serious symptoms than damage to the right brain. Such as stroke patients, who in the left cerebral hemorrhage than the right cerebral hemorrhage more prone to loss of speech and mental retardation. This clearly shows that the left and right hemispheres in the brain are functionally different. However, what are the different aspects of this study? At that time, people still had doubts about it and could not explain it clearly. In the 1950s, Dr R. Sperry of the Galician Institute of Technology in Galilee and his student Dragon Myers started a split-brain experimental study of animals. When they cut off all the links between the cat’s and the monkey’s two hemispheres, they were astonished to find that these animals were still normal; even more exciting,