358 



THE VITAMINES 



cramps of some muscle groups; in severe cases, there is spastic or 

 atactic gait. As terminal symptoms, there are tetanic, epileptic 

 attacks, and paralysis of the sphincters. Mental disorders belong 

 to the typical picture of severe pellagra. The initial symptoms are 

 insomnia, quietness, sadness, later hypochondria and finally psychoses 



FIG. 68. SPINAL CORD; LUMBAR 

 REGION (MOTT) 



A - 



' 



4 



FIG. 69. CELLS OP VENTRAL 

 HORN WITH ASYMMETRIC 

 NUCLEI (MOTT) 



FIG. 70. SCIATIC NERVE IN 

 PELLAGRA; LONGITUDINAL 

 SECTION (Morr) 



FIG. 71. CELL OF BETZ IN 

 MOTOR CORTEX (MOTT) 



of all kinds. The latter develop in 10 per cent of all cases in Italy, 

 in about 5 per cent in America, apparently more often in the chronic 

 form. According to Sandy (1319) the number of pellagra psychoses 

 among the inmates of insane asylums is very large in the southern 

 states. Miller and Ismail (1320) investigated the various types of 

 pellagrous lunatics in Egypt, classifying 750 cases as follows: 



