PRENATAL GROWTH OF THE HUMAN SPINAL CORD 



MAX MAYO MILLER 



From the Anatomical Laboratory, University of Missouri 



TWELVE FIGURES 



CONTENTS 



Introduction 39 



Material and methods 40 



Observations and discussion > 43 



A. Cord as a whole 43 



L General form of the prenatal spinal cord 43 



2. Special features in the various embryos 44 



3. Growth of the cord as a whole 46 



4. Growth of the various regions 47 



a. Cervical region 47 



b. Thoracic region 48 



c. Lumbo-sacral region 49 



B. Gray matter 50 



1. General form 50 



2. Special features in the various regions 50 



3. Growth as a whole 51 



4. Growth of the various regions 52 



C. White matter 52 



1. Form 52 



2. Growth as a whole 52 



3. Growth in the different regions 53 



D. Ependyma with the central canal 53 



1 . Form 53 



2. Growth 54 



Summary 54 



Bibliography 57 



INTRODUCTION 



In human embryology the changes in form and the histological 

 differentiation in the cellular elements of the spinal cord have been 

 studied very carefully. But as yet little has been done on the 

 absolute and relative prenatal growth of the cord as a whole and 



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THE JOURNAL OF COMPARATIVE NEUROLOGY, VOL. 23, NO. 1 



