THE CENTRAL NERVOUS SYSTEM IN A CASE OF 

 CYCLOPIA IN HOMO 



D. DAVIDSON BLACK 



From the Anatomical Laboratories of the University of Chicago and Western Reserve 



University 



FIFTY-ONE FIGURES 



CONTENTS 



Introduction 193 



General description of the case 195 



External features 195 



Cranial cavity, dura in situ 198 



Cranial cavity, dura removed 198 



Vascular anomalies 201 



Contents of the orbital fossa 204 



Macroscopic description of the the brain 210 



Technique 215 



Microscopic description of the brain 215 



Brain stem and cerebellum 215 



Thalamic mass 220 



Cerebral vesicle 222 



Cortex cerebri 222 



Cerebral limbi 231 



Ventricular anomalies 233 



Mechanical considerations 235 



Review of case reported by O. Naegeli 239 



Conclusion 241 



Literature cited 243 



INTRODUCTION 



Although cyclopia in man is a somewhat rare condition, yet 

 among the cases reported few deal with other than the external 

 features of the malformation. Up to the present, the onl}^ in- 

 vestigation into the finer structure of the central nervous system 

 in a case of cyclopia in homo has been made by O. Naegeli in 



193 



