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Paul Flechsig’s System of Myelogenetic Cortical Localization In the Light of Recent Research in Neuroanatomy and Neurophysiology Part II

Published online by Cambridge University Press:  18 September 2015

Alfred Meyer
Alfred Meyer*
Affiliation:
Department of Neuropathology, Institute of Psychiatry, London
*
38 Wood Lane, London, N6 5UB, U.K.
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Abstract

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In 1896 Flechsig was still under the influence of Hermann Munk (1890) who had assumed that the cortex consisted of sensory centers, each equipped with efferent descending projection systems — olfactory, visual, auditory and — anterior to the last, the somatic sensory sphere (“Körperfühls-phäre”). This sphere also contained the kinaesthetic images of motor action induced by efferent fibers in the subcortical ganglia which, from Burdach (1819-26) until the time of Meynert, had been widely regarded as the highest motor centers. In 1905a, however, Flechsig had shed most of the influence of Munk. By then he had taken cognizance of the research of Grunbaum and Sherrington (1902, 1903) and realized that “in the highest anthropoid all stimulable points of the type of Fritsch and Hitzig are concentrated within one gyrus, namely the precentral gyrus, so that we can call this the motor gyrus … in man, too, the motor centers of the type of Fritsch and Hitzig are restricted to the precentral gyrus and the immediately adjacent part of the first frontal convolution. The central sulcus here too is the posterior boundary of the motor zone … Occasionally a larger or smaller part of the motor centers, especially of the fingers, gets into the postcentral convolution, but, according to my own embryological studies, only exceptionally. As a rule we have to assume that all voluntary motor impulses leave the cortex from the precentrai gyrus …”

Type
Articles
Information
Canadian Journal of Neurological Sciences , Volume 8 , Issue 2 , May 1981 , pp. 95 - 104
Copyright
Copyright © Canadian Neurological Sciences Federation 1981

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