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CHAPTER III. SIGNIFICATION OF THE SUBJECTIVE SYMPTOMS WHICH
PRESENTED THEMSELVES IN THE CASES RELATED. Loss of memory,
confusion of thought, inability to concentrate the attention on any
subject, and horrible dreams, were symptoms of mental disturbance,
while the perversion or failure of the senses of sight, hearing,
smell, taste, and, in part, touch also, in the various modes and
degrees mentioned, were symptoms of sensorial disturbance; both
sets of symptoms indicating implication of the brain, either
directly at the time of the accident, or consecutively by
transmission to the brain of morbid action from the primarily
injured spinal cord. The disturbances of the motor power were
chiefly due to the injury of the spinal cord, as we shall see; but
some of them, also, such as the general impairment of the muscular
energy, no doubt arose from the cerebral implication. ASTHENOPIC
SYMPTOMS. Inability of the patient to exert his sight longer than a
few minutes, even though he may still be able to make out the
smallest print, was, we have seen, astriking symptom in all the
cases related. This as- thenopia, it is to be observed, is not
owing merely to impaired power of maintaining the adjustment of the
eyes for the exercise of the sight on near objects, as in the
common form of the complaint, but is owing also in part to the
erethism or state of irritable weakness in which the eyes are, and
which is a manifestation of impaired vital energy of the optic
nervous apparatus occasioned by disturbance of the circulation in
it. The patients have sometimes, indeed, appeared to be helped by
convex glasses, as in common asthenopia; but it has always struck
me that it was as much or more by their mere magnifying power, as
in amblyopia or defective sensibility of the retina, that t...
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