THE 
VETERINARIAN. 
VOL.Vll, No. 82.] OCTOBER 1834. [New Series, No. 22. 
MR. YOUATT’S VETERINARY LECTURES, 
DELIVERED AT THE UNIVERSITY OF LONDON. 
LECTURE XLIV. 
The Diseases of the Sensorial System—The Effect and Treat¬ 
ment of Compression of the Brain in Fracture of the Cranium. 
— The Hydatid in the Sheep—The Symptoms and Treatment 
of the Disease . 
I HAVE ventured in a former lecture to hint at the connexion 
of the medullary portion of the brain with the mere animal prin¬ 
ciple, and that of the cortical or cineritious part with the 
intellectual one. I have traced in all our domesticated quadrupeds 
the prevalence of the former, and the comparatively little develop¬ 
ment of the latter : and thence it arose, that while the preponder¬ 
ance of animal power enabled them to discharge the services we 
required from them, the deficiency of that portion in which the 
various impressions received by the senses are registered and 
compared, limited their intellectual capacity, and preserved them 
more securely our slaves. This will enable us to account for 
the fact, that there are few or no diseases in quadrupeds which 
strictly and primarily affect and influence the intellectual prin¬ 
ciple. Quadrupeds may occasionally have the same perverseness 
of temper, the same vicious habits, that disgrace the human being 
—sometimes the same ungovernable passions—but nothing of 
that disturbance of mind, that marked derangement of judgment, 
which we are accustomed to term insanity. There are, however, 
certain mechanical affections of the brain which are often pro¬ 
ductive of fatal consequences. These are principally referable to 
compression and congestion, or to inflammation. 
Effects of Pressure on the Brain. — Fracture. —I have stated, 
that while considerable portions of the cineritious part may be 
cut aw’ay, without the aninral seeming to be scarcely conscious 
of the act, the smallest pressure could not be made on the brain 
without impairment of consciousness, or of the power of voluntary 
motion. The first illustration we have of this, is in fracture of 
3 x 
VOL. VII. 
