2007英语四级100篇精读荟萃中级篇(三十四)
文章作者 100test 发表时间 2008:04:19 12:25:32
来源 100Test.Com百考试题网
Passage Thirty-four (The Relationship between Brain Process with Mental Experience)
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
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