PRENATAL GROWTH OF SPINAL CORD 



57 



BIBLIOGRAPHY 



HoNNOT, E., AND Seevbrs, R. 1906 On the structure of a human embryo eleven 



millimeters in length. Anat. Anz., Bd. 39. 

 Bryce, T. H. 1908 Embryology, Quain's Anatomy, vol. I, 11th Ed. New York. 

 Donaldson, H. H., and Davis, D. J. 1903 A description of charts showing the 



areas of cross-section of the human spinal cord at the level of each spinal 



nerve. Jour. Comp. Neur., vol. 13. 

 His, W. 1886 Zur Geschichte des Menschlichen Ri'ickenmarks und der Nerven- 



wurzeln. Abh., K. Sachs. Ges. d. Wiss., Bd. 13. 

 Jackson, C. M. 1909 a On the developmental topography of the thoracic and 



abdominal viscera. Anat. Rec, vol. 3. 



1909 b On the prenatal growth of the human body and the relative 



growth of the various organs and parts. Am. Jour. Anat., vol. 9. 

 MiNOT, C. S. 1892 Human embryology. New York. 

 Stilling, B. 1859 Neue Untersuchungen liber den Bau des Riickenmarkes. 



Cassel. 

 Streeter, G. L. 1911 In Keibel and Mall's Handbuch der Entwicklungschichte 



des Menschen., Bd. 2. Leipzig. 

 ViERORDT, H. 1906 Anatomische, Physiologische, und Physikalische Daten 



und Tabellen. 3 Aufl. Jena. 



TABLE 1 



Showing total volumes of spinal cords of various ages; the absolute and relative 

 amounts of gray matter, of white m,atter, of ependymawith the canal, and of the differ- 

 ent regions of the cord 



Embryo No. 



Length in mm 



Age in days (estimated). 



58 



Child Adult 

 (Stilling) 



2 years 



Total volume of cord (cc. ) 



Volume of gray matter (cc.) . 

 Volume of white matter (cc.) 

 Volume of ependyma and 



canal 



Gray matter (%) 



White matter (%) 



Ependyma and canal (%) . . . 

 Volume of cervical region (cc.) 

 Volume of thoracic region (cc' 

 Volume of lumbar region! 



(cc.) i 



Volume of sacral region (cc.)J 



Cervical region (%) 



Thoracic region (%) 



Lumbar region (%) 



Sacral region (%) 



0.00402 

 0.00152 

 0.00053 



0.00197 

 37.93 

 13.18 



48.89 

 0.00148 

 0.00129 



0.00125 



36.75 

 32.19 



0.01194 

 0.00594 

 0.00308 



0.00292 



49.76 



25.79 



24.45 

 0.00376 

 0.00410 



0.00408 



31.52 

 34.32 



0.02115 

 0.01161 

 0.00686 



0.00268 



54.90 



32.43 



12.67 

 0.0057£ 

 0.0073E 

 ' 0.00510 



_ 0.00293 

 27.09 

 34.94 

 24.11 

 13.86 



7.424 

 1.981 

 5.443 



26.68 

 73.32 



2.697 

 3,359 

 0.915 



0.453 

 36.33 

 45.34 

 12.32 



6.01 



27.327 



5.353 



21.974 



19.58 

 80.42 



8.557 

 13.662 

 4,012 



1.096 

 31.33 

 50.00 

 14.68 



3.99 



