154 
INFLAMMATION OF BURSA OF LIGAMENTUM NUCILE. 
of tincture of iodine were injected into the thyroid, and iodide of potassium 
given internally; improvement was noted, and recovery occurred in six 
weeks. 
Jewsejenko reported the case of a four year old English thoroughbred 
maie, which lost appetite after a race and showed great thirst, weakness, 
palpitation of the heart, and frequency of pulse, with swelling of the thyroid 
and eyelids and reddening of the conjunctiva. Fourteen days later exoph- 
thalmus occurred, the thyroid gland showed pulsation, and death occurred in 
foui weeks, with symptoms of anaemia and exhaustion. Whether paralysis of 
the sympathetic, thought to be the cause of Basedow’s disease in man, was 
also present here cannot be decided. A horse in Cadiot’s practice was found 
to be much wasted, low in condition, and to have one fore-foot painfully 
swollen. (Edematous swellings were present at different points on the body, 
and the left half of the thyroid was much enlarged. The arteries lying near 
the surface, amongst others the carotid, the posterior auricular, and the 
metatarsal arteries, showed powerful rhythmical movements ; the frequency 
of the pulse was from 70 to 80 per minute. In the cardiac region the labour¬ 
ing action of the heart was distinctly noticeable, the thoracic wall visibly 
moving. . Examination of the blood showed no tendency to leukaemia. The 
patient died on the third day without having shown exophthalmus. The 
heart weighed 14 lbs., and the great blood-vessels were twice the normal 
diameter. 
Biisot observed marked enlargement of the thymus gland in a two year old 
cow. The swelling extended from the 3rd ring of the trachea to the sternum, 
and transversely from one jugular to the other. It was hard, painless, and 
weighed at the time of death 13| lbs. 
INFLAMMATION OF THE BURSA OF THE 
LIGAMENTUM NUCH^E. 
In the hoi se the funicular portion of the ligamentum nuchse is provided 
on the summit of the second cervical vertebra with a mucous bursa, which 
attains the size of an apple, and is covered on both sides of the ligament 
by the complex muscles. Loose connective tissue attaches the inner 
surfaces of these muscles to the bursa. Poll-evil is due, then, to a bursitis, 
produced by bruising, less frequently by metastatic inflammation like that 
of stiangles, and, though usually acute at first, tends to become chronic. 
The first injury may be caused by the animal striking its poll against a 
rack or low door; by a fall, or blow with a heavy whip-handle; less 
commonly from pressure of the halter, or, as Hertwig believed/ from 
violently bending the neck when being reined up. Among animals at 
grass, this bursitis is more generally caused by external injuries than 
by straining the muscles of the neck during grazing. 
Symptoms. A characteristic longish round swelling, about 4 to 6 inches 
long, appears over the first two cervical vertebrae close to the middle line, 
is accompanied by inflammatory symptoms, and sometimes affects one 
side, sometimes both. At first fluctuating and sharply defined, it soon 
extends to the surrounding soft parts, becomes diffuse and less yielding. 
