vii. \ri'A.Mi.\ A i)i:fi('ik.\( ^' i\ animals 



123 



iiijui-\\ 'rii(\\- cDiiiain liolli cortical and incdullaiA' sul),staiic(' sliowin*; all 

 (Icfirccs ol (Iciicncial ion, necrosis, and the usual cellular I'esponses on the 



Fig. 35. \ iramin A dpHciency in the rat. Cross section of u lumbar vertebra show- 

 ing pits occupied by buckled nerve roots. From a 9-week-old rat which had shown 

 j^aralysis from S to 10 days. 



part of neuroglia and phagocytic cells. A description of the nerve root 

 herniations and assDciated peripheral nerves would include all the classic 

 features of Wallerian defi;eneration. Evidence that the axons are not pri- 

 marily impaired by the dcliciency was shown'^ hy the fact that, proximal 



