PARALYSIS — PALSY. 37 



cases standing on record — though they include causes which, from 

 their nature, lead one to doubt — I feel bound to pay due atten- 

 tion ; and therefore I submit the following accounts, taken from 

 D'Arboval's Dictionary, without, on my part, any kind of annota- 

 tion : — 



M. Damoiseau knew a three-year-old horse to be suddenly attacked with 

 general paralysis, after having been copiously bled by a farrier for indigestion. 

 M. Laurezal witnessed an attack of paralysis in a mule, on the suppression 

 of a fistula which had been discharging for eighteen months. — M. Olivier 

 participated in an observation made at the Veterinary School at Lyons, of 

 paraplegia appearing the morning after firing for ringbone. — Lean horses 

 rapidly made fat by sainfoin and lucerne, and other nutritive diet, have been 

 known to experience paralysis, of which D'Arboval says he had a case in a 

 mare of his own. — Furthermore, we are informed by D'Arboval that, in the 

 course of his own practice he occasionally meets with paralysis in horses, 

 arising from indigestion and nephritis : Vatel and Olivier, he says, have pub- 

 lished cases of the former; and in respect to the latter, he tells us that it not 

 only occurs in horses, but likewise in oxen and sheep. 



Pathology. — Sir Charles Bell has proved beyond question, 

 by experiment confirmed by observation, that of the two sets of 

 roots by which the spinal nerves take their origin, the anterior 

 are conductors of sensation, the posterior of the power of motion ; 

 and there is good reason for believing that the correspondent 

 columns of the spinal marrow are similarly endowed and equally 

 distinct in their economy : supposing, therefore, that one set of 

 columns or roots are aflfected, the other remaining in their normal 

 condition, the effect is, that mobility is lost, while sensibility is 

 retained, or vice versa. In beautiful illustration of this, the case 

 following is given by Sir Charles. In a patient under his care a 

 tumour existed " of the form of an almond but larger, and into it the 

 motor nerves both of the right and left sides were gathered, while 

 the sensitive roots remained free." The result was — in practice 

 as was by theory foretold — that the lower extremities were de- 

 prived of motion, whilst their sensibility remained undisturbed. 

 The case of a horse, related by M. Bouley in the Recueil de 

 Mtdecine Vtterinaire, serves, so far as effects go, to confirm the 

 above. A stallion, five-years-old, was seized with paraplegia. 

 He sweated from pain, and his pulse grew full and strong, and yet 



