Under the comprehensive designation of "traumatic neuroses," there have been grouped a number of symptoms in varying combination whose exact mechanism is still largely shrouded in doubt. Some of these manifestations are looked upon as purely functional disturbances, but, inasmuch as it is difficult to conceive of such disturbances without structural alteration, the explanation can be accepted only with the understanding that there may be present changes as yet undemonstrable with the aid of our present resources. On the other hand, some of the nervous symptoms following traumatism are unquestionably dependent on recognizable structural or organic lesions. The evidence on which these opinions have been formed is derived from both clinical and pathologic as well as experimental sources. In the past, much uncertainty has existed with regard to the disturbance to which was given the name of "concussion" or "commotion" of the nervous system. At the present time it seems
CONCUSSION OF THE NERVOUS SYSTEM. JAMA. 1900;XXXIV(12):754–755. doi:10.1001/jama.1900.02460120050006
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