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ARCHIVES OF SEMIOLOGY AND PSYCHIATRY 



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llitzig. 1 " who interpreted the disorders of movement variously as due 

 to the loss of muscular and cutaneous sensitivity or to the loss of 

 kinesthetic images of the movements to be performed. 



Following the suggestion of Tamburini, Luciani and Seppili 1X 

 advanced the view that the motor areas contained somesthetic projec- 

 tion fibers as well as motor elements, and developed a theory of the 

 sensorimotor function of the sigmoid gyrus and rolandic areas. In 

 this they were followed by Horsley, 12 Mott, 13 Dana. 14 Rothmann 15 and 

 many others. 



De Barenne, 10 in particular, has demonstrated the existence of 

 marked sensory disturbances in the cat after application of strychnin 

 to an area which widely overlaps the stimulable area, and the general 

 correctness of Luciani's view for the stimulable areas of lower mam- 

 mals does not seem open to question, although there may be some doubt 

 as to whether the motor functions of the cortex in these forms are 

 comparable with those of primates. 



Recent more critical work with primates, however, shows that in 

 them a further specialization has occurred with the development of the 

 fissure of Rolando as a line of demarcation between centripetal and 

 centrifugal projection areas. 17 The work of Schafer, is Mills, 1(l Griin- 



10. Hitzig, E. : Physiologische unci klinische Untersuchungen iiber das 

 Gehirn, Berlin, 1904. 



11. Luciani, L., and Seppili, G. : Die Funktion-Localization auf der Gross- 

 hirnrinde, Deutsche Ausgabe, Leipzig, 1886. 



12. Horsley, V. : On the Analysis of Voluntary Movement, 19th Century 

 29:857-870, 1891. 



13. Mott, F. W. : The Sensory-Motor Functions of the Central Convolutions 

 of the Cerebral Cortex, J. Physiol. 15:464-487, 1893-1894. 



14. Dana, C. L. : A Study of the Functions of the Cortex of the Motor Area 

 of the Brain, J. Nerv. & Ment. Dis. 21:761-785, 1894. 



15. Rothmann, M. : Leber die elektrische Erregbarkeit der Zentral- 

 windungen, Monatschr. f. Psychiat. u. Neurol. 32:489-502, 1912. 



16. Barenne, J. G. D. de: Sensory Localization in the Cerebral Cortex, Quart. 

 J. Exper. Physiol. 9:355-390, 1916. 



17. The lack of any persistent paralysis in rodents, carnivora and ungulates 

 after destruction of the stimulable areas and the occurrence of partial paralyses 

 after destruction of parts of the corpus striatum in lower forms suggest that 

 the differentiation of function of precentral and postcentral gyri in primates 

 may be due rather to the acquisition of primative striate functions by the 

 cerebral cortex than to a division of cortical functions which overlap in lower 

 forms. 



18. Schafer, E. A.: On the Alleged Sensory Functions of the Motor Cortex 

 Cerebri, J. Physiol. 23:310-314, 1898. 



19. Mills, C. K. : The Separate Localization in the Cortex and Sub-Cortex of 

 the Cerebrum of the Representation of Movements and of Muscular and Cutane- 

 ous Sensibility, J. Nerv. & Ment. Dis. 38:595-619, 1901. 



