. A treatise on nervous and mental diseases, for students and practitioners of medicine. nd Gunning, Practical Treatise on Electricity in , Principles of and Rohe, Practical Electricity in , Elelitro-diagnostik und Elelitrotherapie. Jolly, Untersuchungeu uber den elektrischen Leitungswiderstand des , Electricity in Medicine. St. Clair, Practical Application in Medicine and , Medical Ziemssen, ])ie Elektricitiit in der Medicin. PART DISEASES CHAPTER I. LOCALIZATION
. A treatise on nervous and mental diseases, for students and practitioners of medicine. nd Gunning, Practical Treatise on Electricity in , Principles of and Rohe, Practical Electricity in , Elelitro-diagnostik und Elelitrotherapie. Jolly, Untersuchungeu uber den elektrischen Leitungswiderstand des , Electricity in Medicine. St. Clair, Practical Application in Medicine and , Medical Ziemssen, ])ie Elektricitiit in der Medicin. PART DISEASES CHAPTER I. LOCALIZATION OF LESIONS IN THE CEREBRUM, CEREBELLUM,AND SPINAL CORD. The diagnosis of the different lesions of the brain and spinal cordare treated of in their proper chapters in this book, but I propose tobriefly outline the Idealization of these lesions in this chapter, so asto obviate the necessity for repetition. LOCALIZATION OF CORTICAL LESIONS. As we have seen, the centres which have so far been localizedin the cortex are the motor area, the centres for vision, word- FiG. 90. WORD-BLINDNESS. SPEECH, Diagram showing localization ol centres in the cortex. deafness, word-blindness, motor aphasia and aphasia of interruptedconduftion, and possibly also the centres for agraphia and themuscular sense, pain, and touch. 120 NERVOUS DISEASES. THE MOTOR AREA. The lesions of the motor area usually produce monoplegic paral-ysis, i. e., they affect cue limb or a group of muscles. It is veryimportant from a diagnostic point of view that this fact should beremembered. The reason for it is very apparent. The centre forthe leg is contained, as has been said, in the upper third of the motorarea, that for the arm in the middle third, that for the musclesof the head and face in the lower third, whilst the centre of the motormechanism of speech is to be found in the third frontal different centres are therefore spread over a considerable areaof the cortex, and in order that they should al
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