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While a hearty meal should not usually be taken just before bedtime, it is not well to go to bed with a sense of positive faintness and hunger. Rather, one should take a very light lunch of quite simple food as a support for the next eight hours. Trunk of the Left Pneumogastric. It is better, as a rule, not to engage in severe study during the hours just before bedtime.
The power of the pneumogastric reflex to inhibit the action of the heart is, of course, easily demonstrated pharmacologically. Clinically reflexes down these nerves interfering with the heart's action cause faintness and serious prostration, if not actual shock, and perhaps, at times, death.
Anatomically, the auditory nerve not only goes to those parts of the brain whence the motor innervation emanates, and to the reflex centres in the cerebellum, but passes close by the vagus or pneumogastric nerve, which rules the heart and the vasomotor functions.
Here is the real reason of all their after bitter dislike. They had a sensitive pocket-nerve. It was a sort of pneumogastric nerve so close did it come to their lives. Jesus touched it roughly. It never quit aching. Scratch all their later charges against Him and under all is this sore spot. The tree of the cross began growing its wood that day.
This line of treatment, faithfully carried out, will cure the very worst cases in time. There are many causes for this distressing complaint. Generally the cause is to be found in the stomach. Something that has no right there is in that organ, and irritating the pneumogastric nerve that connects the stomach with the brain. It is a common symptom of dyspepsia.
A frequent cause of irregular heart action in women, more especially of increased rapidity, is hyperthyroidism. There may be an arrhythmia due to some nervous stimulation, probably through the pneumogastric, so that the pulse varies abnormally during respiration, being accelerated during inspiration and retarded during expiration more than is normally found in adults.
While in some instances it has been declared that digitalis should be rapidly pushed to the full extent and then dropped for a time, careful experience shows that this method is often not tolerated, sometimes does positive harm, and has at times seemed to hasten death. Another valuable activity of digitalis is in slowing the heart by action on the pneumogastric nerves.
Soon, by some disarrangement of the inhibitory apparatus, the pneumogastric nerves, the heart loses its governor, and the beats increase to even 150 a minute, with irregular contractions, the blood being sent through the arteries with irregular force, as evidenced by the varying volume of the pulse.
The former appears to be connected with the restraining ganglia; the latter with the exciting ganglia. Thus, if a person were the subject of some emotion which caused fainting, the explanation would be that the impression had been conveyed to the brain, and from the brain to the heart by the pneumogastric nerves. The result would be that the heart for an instant ceases to beat.
Reflex pain may occur from disturbances of the pneumogastric nerve, or from the weight and pressure of the enlarged and heavy pericardium. Reflex vomiting may be a troublesome and distressing symptom. Acute pericarditis occurring in rheumatism, in acute infections, and from simple injuries tends to recovery.
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