6o G. H. MONRAD-KROHN. M.-N. Kl. 



The deep sensation^ on the other hand, is surprisingly well preserved. 

 In all kinds of polyneuritis we meet this dissociation between well 

 marked superficial sensory loss and comparatively well preserved deep 

 sensation ; but I know of no other kind of polyneuritis where this is so 

 constant, nor so pronounced. Not only is the sensation of deep pressure 

 intact, but also the joiid sense is extremely well preserved — even where 

 there are severe mutilations. This explains the absence of ataxic phenomena, 

 which has already been mentioned in the previous chapter. As regards 

 the deep pressure pain we find also in leprosy sometimes the JiypcraestJicsia 

 to deep pressure so often encountered in polyneuritis from other causes ; but 

 this is perhaps not so pronounced nor so common as in the alcoholic, and 

 in the more acute infectious forms of polyneuritis. 



As repeatedly mentioned, the ner\es themselves will often be found 

 thickened. This thickening may either be diffuse and even, or nodular. 

 The thickened ner\es are sometimes tender, and the palpation then gives 

 rise to pain that will irradiate to the peripheral distribution of the nerve. 

 This is chiefly found in the earlier stages. Later on the nerve trunks 

 become hypoalgetic or even completely analgetic. 



The nerves that I have found most frequently thickened are the ulnar 

 nerve, the gieat auricular nerve, the superficial pereonal nerve, and the 

 supraorbital nerve. 



In 40 cases Laehr has found thickening of the 



n. ulnaris 29 times 



n. auricularis magnus 26 — 



n. tibalis (behind the internal malleolus) 17 — 



n. supraorbitalis 13 — 



n. peroneus (behind the capitul. fibulae) 11 — 



n. subcutaneus colli 10 — 



n. tibialis (in the popliteal space) 4 — 



n. medianus 4 — 



n. radialis 2 — 



n. cutaneus brachii internus 2 — 



n. saphenus major i — 



(It is possibly due to my not having explored s^'stematically the tibial 

 nerve behind the international malleolus, but chiefly in the poplitial space, 

 that I have not found it thickened so frequently as the peroenal and supra- 

 orbital nerves.) 



