首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
By 1950. the results of attempts to relate brain processes to mental experience appeared rather discouraging. Such variations in
By 1950. the results of attempts to relate brain processes to mental experience appeared rather discouraging. Such variations in
admin
2010-03-19
19
问题
By 1950. the results of attempts to relate brain processes to mental experience appeared rather discouraging. Such variations in size, shape, chemistry, conduction speed, excitation threshold, and the like as had been demonstrated in nerve cells remained negligible in significance for any possible correlation with the manifold dimensions of mental experience.
Near the turn of the century, it had been suggested by Hering that different modes of sensation, such as pain, taste, and color, might be correlated with the discharge of specific kinds of nervous energy. However, subsequently developed methods of recording and analyzing nerve potentials failed to reveal any such qualitative diversity. It was possible to demonstrate by other methods refined structural differences among neuron types: however, proof was lacking that the quality of the impulse or its conduction was influenced by these differences, which seemed instead to influence the developmental patterning of the neural circuits. Although qualitative variance among nerve energies was never rigidly disproved, the doctrine was generally abandoned in favor of the opposing view, namely, that nerve impulses were essentially homogeneous in quality and were transmitted as "common currency" throughout the nervous system. According to his theory, it is not the quality of the sensory nerve impulses that determines the diverse conscious sensations they produce, but rather the different areas of the brain into which they discharge, and there is some evidence for this view. In one experiment, when an electric stimulus was applied to a given sensory field of the cerebral cortex of a conscious human subject, it produced a sensation of the appropriate modality for that particular locus, that is, a visual sensation from the visual cortex, an auditory sensation from the auditory cortex, and so on. Other experiments revealed slight variations in the size, number, arrangement, and interconnection of the nerve cells, but as far as psychoneural correlations were concerned, the obvious similarities of these sensory fields to each other seemed much more remarkable than any of the minute differences.
However, cortical locus, in itself, turned out to have little explanatory value. Studies showed that sensations as diverse as those of red, black, green, and white, or touch, cold, warmth, movement, pain, cortical areas. What seemed to remain was some kind of differential patterning effects in the brain excitation: it is the difference in the central distribution of impulses that counts. In short, brain theory suggested a correlation between mental experience and the activity of relatively homogeneous nerve cell units conducting essentially homogeneous impulses through homogeneous cerebral tissue. To match the multiple dimensions of mental experience psychologists could only point to a limitless variation in the spatiotemporal patterning of nerve impulses.
From the passage we know that the nerve impulses in human beings ______.
选项
A、are lack of differentiation in quality
B、are similar in size, number, and arrangements
C、reveal qualitative diversity
D、spasmodically pass through the nervous system
答案
A
解析
语义理解题。问人类的神经脉冲的性质。文章说:“…神经脉冲从本质上来讲在性质上都是一样的,它作为一般流通被传输到神经系统”(…that nerve impulses were essentially homogeneous in quality and were transmitted as common currency,throughout the nervous system),所以人类的神经脉冲缺乏差异性,并持续不断地通过神经系统。
转载请注明原文地址:https://kaotiyun.com/show/U59K777K
0
专业英语四级
相关试题推荐
Apartfromahandfulofweatherstations,within2000milesoftheSouthPolethereishotasingletree,industry,or______.
Thecompanyleaderhasnoteverdoneanythingyetalthoughhepromisedtohavemycomplaint______.
Manystudentsfindtheexperienceofattendinguniversitylecturestobeaconfusingandfrustratingexperience.Thelecturersp
Onlytoday______knowntopublic.
Agoodmarriagemeansgrowingasacouplebutalsogrowingasindividuals.Thisisn’teasy,marriagehasalwaysbeendifficult.
Modemadvertisingmentrytojustifywhattheydobytellingusoftheadvantagesofadvertising.Thus,itissaidthatadvertis
Certainlynocreatureintheseaisodderthanthecommonseacucumber.Alllivingcreature,especiallyhumanbeings,havetheir
Everybodyseemstoenjoy______.
Theladyinred______whenthemotorrushedawayallofasudden.
随机试题
简述秦汉时期宰相制度的变迁。
A.T3T4↑、TSH↓、TRH兴奋试验(一)B.T3T4↓、TSH↓、TRH兴奋试验(一)C.T3T4↑、TSH↑、TRH兴奋试验(一)D.T3T4↑、TSH↑、TRH兴奋试验(+)E.T3T4↓、TSH↑、TRH兴奋试验(+)符合异源性TS
举例说明增加药物溶解度的主要方法。
固位体应具备的条件中,哪一项最不重要
[2006年第69题]伸顶通气管的设置,下列哪项做法是错误的?
下列行业财务风险分析指标中,越低越好的是()。
航空服务按照交通运输服务缴纳增值税。()
在一场娱乐晚会上,有5位民间歌手(1至5号)登台演唱,由现场数百名观众投票选出最受欢迎歌手,各位观众须彼此独立地在选票上选3名歌手,其中观众甲是1号歌手的歌迷,他必选1号,不选2号,另在3至5号中随机选2名,观众乙和丙对5位歌手的演唱没有偏爱,因此在1至5
随着各地租房政策的推出,“租房可就近入学”等关于“租购同权”的消息,引发了社会的广泛讨论。针对1973名生活在一线城市的18—35周岁的受访青年进行的调查显示,面对“租购同权”政策,49.8%的受访一线城市青年觉得以后“只租不买”会成为年轻人中的趋势,18
Trainingisacostlyexerciseforanyorganizationtoundertake.Itrequiresmuchthough,theestablishmentofaregulartrainin
最新回复
(
0
)