54 



PSYCHOBIOLOGY 



ferior notch p of one and the ' superior notch of the one below it form a 

 lateral opening, the intervertebral foramen, through which run the 



Dura mater spinalis ^ 



Posterior septum 



Posterior root 



Subdural space » 

 Arachnoid 

 Subarachnoid space v \/ 

 Pia mater spinalis ^ \_ 



Ligamentum denticulatum 

 Anterior root 

 Spinal ganglion 



Anterior branch 



'J 



Posterior branch 



Ramus communicans 



Fig. 40. Cross-section through fourth cervical vertebra, showing cord and its cover- 

 ings. Enlarged about two diameters. (Bailey, Histology, after Rauber-Kopsch.) 



Columna posterior 



(Hintersaule) 



•, Columna lateralis 

 (Seitensaulel 



Column* anterior 



I Vordersaule) 



Fig. 41. Cross-section through spinal cord of adolescent, at level of first cervical 

 nerve. Magnified two diameters. (Toldt, Anatomischer Atlas.) 



