With vogard to. disease the insists claim that it has a purely physical origin: the paythologists contend that it jarge measure due to mental iychic imperfections. Many disefasses are unaccompanied by any perceptible change of tissue as is the case with palsy, fits, loss of consciousness or power of speech, ote, Such diseases are known as "functional and, in spite of the materialistic trend of modern scientific research, the belief is spreading that they' owe their origin, to" purely. psychic influentes. Thus, for example, the idea occurs that the arm can: not be moved. without causing severe pain. This may produce a palsy of the arm hardly
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