INVOLUNTARY SHAKING OF THE HEAD. 
321 
mentous an occasion in veterinary education in America. There will be 
old friendships to renew ; there will be a mingling of pleasure and glad¬ 
ness for all ; a reminiscent period for each one, and a comparison of col¬ 
lege days then and now. There will be many an experience to relate, 
many a disappointment to tell of, many a victory to record, and there 
will be one more opportunity of being for a day with that grand old man 
whom every A. V. C. boy loves, whom every member of the American 
veterinary profession honors, the Dean of the American Veterinary Col¬ 
lege, Prof. A. Liautard. ” 
ORIGINAL ARTICLES. 
INVOLUNTARY SHAKING OF THE HEAD AND ITS 
TREATMENT BY TRIFACIAL NEURECTOMY. 
By W. T. Williams, D. V. S., 
Professor of Surgery, New York State Veterinary College. 
About two years ago the writer communicated the'case of a 
horse suffering from involuntary jerking of the head which was 
effectively relieved by trifacial neurectomy. 
While this one case was interesting and suggestive it stood 
alone, so far as we know, in veterinary annals and did not fur¬ 
nish sufficient data to constitute a secure foundation for diag¬ 
nosis, therapeutics or prognosis. 
Subsequent to that date we have been fortunate enough to 
secure for operation three additional cases, two of which were 
operated upon by us, the third by student P. under our direc¬ 
tions. 
These with a goodly number of cases not operated upon fur¬ 
nish sufficient data "to warrant us in tentatively arranging the 
symptoms of the affection, simplifying its diagnosis, proposing 
a workable technique for operating and rendering a thoroughly 
favorable prognosis possible. 
The malady is probably a neurosis of the infraorbital por¬ 
tion of the super-maxillary division of the trifacial nerve and 
possibly chiefly or even wholly confined to those branches of the 
nerve which pass dorsalwards or toward the nose immediately 
upon emerging from the foramen. 
