LOCALIZATION IN THE BRAIN.
LOCALIZATION IN THE BRAIN.
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大脑中的定位。
DOI:
10.1126/science.ns-3.63.484
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发表时间:
1884
期刊:
影响因子:
56.9
通讯作者:
H. H. Donaldson
中科院分区:
文献类型:
--
作者:
H. H. Donaldson
SINCE 1870, when Fritsch and Hitzig showed that the cortex of the brain was excitable, physiologists have been actively experimenting on it. Thus far, investigation has given rise to two theories regarding the function of this gray matter. One theory looks upon it as the seat of the higher intellectual activities: the other, considering it as a sort of mosaic composed of small areas, looks upon each area as possessing some definite function, either sensory or motor. Moreover, such is the nature of these areas, according to this theory of localization, that, if they be stimulated, perfectly definite movetnents or sensations are excited, while, if they be destroyed, the movements or sensations over which they preside are abolished. At the International medical congress held in London in the sununer of 1881, these views were both ably represented; the former being supported by Professor Goltz of Strasburg, while Dr. Ferrier and Professor Yeo, both of London, represented the latter. Goltz had a dog, and Ferrier a monkey. The animals were exhibited before the physiological section of the congress, and each investigator stated his conclusions as based on the animals presented. Both animals were then killed, and their brains placed for examination in the hands of an eminent committee, consisting of Dr. Gowers, Dr. Klein, Prof. EA Schaefer, and Mr. JN Langley. The reports of this conlmittee have recently been published in the Journal of physiology (vol. iVa Nos. 4 and 5); and, having now before us this complete description of the lesions, it is possible to estimate the value of the peculiarities exhibited by the animals while alive. The dog presented by Goltz had been subjected, between November, 1880, and May, 1881, to five operations. By these a large portion of the cortex of both hemispheres had been washed away with· a stream of water. Casually observed, this dog showed nothing abnormal in its bearing. It ran round the room, wagging its tail and sniffing about, as any dog is apt to do in a strange place. Its expression, however, was stupid, and its gait heavy; but it appeared to possess all its senses, and have control over all its muscles,-two points which are to be emphasized as of fundamental importance in the present djscussion. This dog was, however, quite different in many ways from a normal dog. In travelling about, it avoided not only real objects obstructing its path, but those which were not real,-such, for instance, as a spot of sunlight on the floor, or a bit of white cloth~ pre8. d: flat..