Meyer, Data of Modem Neurology. 307 



in acute nerve intoxication, perhaps merely a phase, usually- 

 transitory, rarely persistent throughout the disease. 



4. Post-diphtheritic paralysis, involving most frequently 

 the muscles of the palate, of the eye (m. ciliaris, rarely abdu- 

 cens), of the pharynx and larynx. Much more frequently the 

 knee jerk is lost. Later paraesthesia may set in, and a diffuse 

 paresis with hypoaesthesia, especially also with incoordination, 

 and the so-called diphtheritic pseudo tabes develops. This sec- 

 ondary symptom-complex forms indeed the most remarkable 

 ' peripheral ' instance of a transitory, usually curable, counter- 

 part of the locomotor ataxia of metasyphilitic origin. 



II. Segmental affections with both motor and sensory 

 disturbance : 



1. Certain occupation pareses. 



2. The typical infections or toxic or asthenic polyneuritis: 

 paraesthesia and anaesthesia of the extremities and paralysis 

 usually beginning with the extensors. The most prominent 

 forms are : 



Alcoholic neuritis with great tendency to involve the cere- 

 bral mechanisms — deliria and typical ' polyneuritic ' psychoses 

 being most frequent in this form. 



Arsenical neuritis — acro-neuritis. In a case of Henschen's 

 there was also plain affection of the ' spinal cord ' with a (sec- 

 ondary ?) hemorrhage. In a case lately obeserved, the cranial 

 nerves became involved and delirium set in (involvement of the 

 highest mechanisms?). 



' Polyneuritis ' following other infectious diseases — tuber- 

 culosis, malaria, influenza, typhoid, etc. 



Endemic forms : beriberi. 



Anemia and cachexia (auto-intoxication ?), diabetes, senil- 

 ity, etc., produce similar clinical symptom-complexes. 



Finally a certain number of cases in which the etiology is 

 difficult to ascertain, including especially many cases of Landry's 

 type, etc. 



III. Segmental affections, chiefly sensory. The proto- 

 type of this group is one form of the metasyphilitic nerve-in- 

 toxication, locomotor ataxia, affecting largely the intra-spinal 



