THE NERVOUS SYSTEM. 



831 



sometimes occur in the brain, usually iu connection with tuberculous in- 

 flammation of the nieninges or ependyma. 



In the spinal cord solitary nodules may determine extensive second- 

 ary degenerations. Multiple tuberculous foci may occur in the cord. 

 They are rare and usually secondary to tuberculosis of the spinal nie- 

 ninges. 



Tuberculous inflammation of nerves is rare except at their origins, 

 where it is due to an extension from tuberculous meninges. When a 

 nerve traverses tuberculous tissues, it may be involved in the inflamma- 

 tory process. 



FIG. 544. -SOLITARY TCBERCLK OF CEREBELLOI. 



a, a, Miliary tubercles with plant cells ; 7>, b, miliary tubercles without giant cells ; c, diffuse tubercle tis- 

 sue ; d, central cheesy mass e, nerve tissue of the cerebellum. 



SYPHILITIC LESIONS IN THE NERVOUS SYSTEM. 



Syphilitic lesions in the nervous system may occur in either the inher- 

 ited or in the acquired form of the disease. In the former they usually 

 show themselves early in life, though cases have been reported after 

 puberty. Gasne in an examination of twenty-six foetuses of syphilitic 

 parents found well-marked syphilitic lesions in four. More commonly 

 it is a tertiary manifestation of the acquired disease occurring from ten 

 to twenty years after the initial lesion. Less commonly cerebral symp- 



