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Updated: May 12, 2025
Here manifestly we have a means by which to determine what selection is able to accomplish. Physiologic experiments may be said to be too short to give any definite evidence. But cases may be cited where nature has selected during long centuries and with absolute constancy in her choice.
In the Journal of the American Medical Association, March 1, 1896, there is an extensive list of gastrotomies performed for the removal of knives and other foreign bodies, from the seventeenth century to the present time. The physiologic explanation of sword-swallowing is quite interesting.
It seems strange that a physiologic process like parturition should be attended by so much pain and difficulty. Savages in their primitive and natural state seem to have difficulty in many cases, and even animals are not free from it.
If to this inference we add the physiologic dictum that the nervous system always acts as a whole, and that it can respond to but one stimulus at a time, we can easily understand that while diverse causes may integrate the nervous system for a specific action, if the cause be suddenly removed, then the result of the integration of the nervous system may be, not a specific action, but an undesigned muscular action, such as crying or laughter.
Opinions differ regarding it, some considering it of septic origin, while others believe it to be nothing but pemphigus foliaceus. Kaposi regards it as an aggravation of the physiologic exfoliation of the new-born. Elliott of New York reports two cases with a review of the subject, but none have been reported in England.
MacDonald offers as a physiologic explanation of this case that probably the impression produced forty-two years before implicated the right brachial plexus and the afferent branches of the pneumogastric, and to some degree the vomiting center in the medulla; hence, when the atmosphere was highly charged with electricity the structures affected became more readily impressed.
The time and place of administration; the degree of pathologic lesion in the subject; the difference in the physiologic capability of individual organs of similar nature in the same body; the degree of human vitality influencing absorption and resistance; the peculiar epochs of life; the element of habituation, and the grade and strength of the drug, influencing its virtue, all have an important bearing on untoward action and tolerance of poisons.
A young man who has caught a glimpse of the highest interpretation of sex in its relation to human life, in short a young man to whom all natural sexual processes are essentially pure and noble and beautiful, is not one who will make grave hygienic mistakes in his own life, and he will not be personally connected with the social evil and its diseases, and he will avoid almost intuitively the physiologic and psychologic mistakes that most often cause matrimonial disaster.
There is another class of abstainers from food exemplified in the exhibitionists who either for notoriety or for wages demonstrate their ability to forego eating, and sometimes drinking, for long periods. Some have been clever frauds, who by means of artifices have carried on skilful deceptions; others have been really interesting physiologic anomalies. Older Instances.
As you will remember, the strength of ordinary crystallized sodium citrate in water should be from 4.05 to 5.41 per cent. Of this five to fifteen minims are injected, the eye having been previously cocainized and adrenalinized. With frequent injections the weaker of the two solutions is mixed with 2 to 4 parts of physiologic salt solution.
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