with laminitis involving all four feet, or with certain forms of
pleuritis, when careful examination is made, yet, in a way, to one not
trained, the clinical symptoms are similar.

Disturbances of nerve function are caused in a variety of ways. It is
not within the scope of this work to discuss central nervous
disturbances caused by ingestion of mouldy provender, or disturbances of
the brain or cord occasioned by infectious diseases, but mention of the
existence of such conditions is appropriate.

By direct injury the result of blows, certain nerves are injured and
muscles supplied by such nerves are rendered inactive. Depending upon
the nature and extent of an injury thus inflicted, so the manner in
which the affection is manifested varies. The suprascapular nerve is
rather frequently injured causing partial or complete loss of function
of the structures supplied by this nerve, and abduction of the
scapulohumeral joint naturally results.

In some cases of dystocia the obturator nerve, (or nerves, if the
involvement is bilateral), becomes injured by being caught between the
maternal pelvis and some dense part of the fetus. This results in
paralysis of the adductors of the thigh if sufficient injury is done.

It is said that nerves become over-stretched and held tense, in certain
positions in which animals are obliged to remain while cast in
confinement such as in some instances where unusual methods of restraint
are employed. When the fore feet are drawn backward in such manner that
great strain is put upon the radial nerve, it suffers more or less
injury, and this is followed by partial or complete paralysis which may
be temporary or permanent.