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Updated: April 30, 2025
When you speak into the mouthpiece the sound waves, which are waves in the air, impinge upon the diaphragm and these set it into vibration that is, they make it move to and fro.
The fits may cease some time before death, or, on the other hand, death may occur during a paroxysm from fixation of the diaphragm and arrest of respiration. Differential Diagnosis. There is little difficulty, as a rule, in diagnosing a case of fulminating tetanus, but there are several conditions with which it may occasionally be confused.
I always do a half hour or so of exercises, vocalizes and scales every morning; these are never neglected. But I never do anything to strain the voice in any way. We are told many fallacies by vocal teachers. One is that the diaphragm must be held firmly in order to give support to the tone. It seems to me this is a serious mistake. I keep the diaphragm relaxed.
By such means the shield was pushed ahead as soon as room was made in front for another move. The purpose of the shield is to prevent the inrush of water and soft material while excavating is going on; the diaphragm of the shields acts as a bulkhead and the openings in it are so devised as to be quickly closed if necessary.
It does, however, transform the variable electric currents of the wireless receiving set into sound vibrations in a most wonderful manner. A telemegafone of either kind is formed of: a telephone receiver of large proportions, a step-down induction coil, and a 6 volt storage battery that energizes a powerful electromagnet which works the diaphragm.
In addition to the enlargement of the chest by the descent of the diaphragm, the ribs are elevated and everted by the muscles attached to them, with the total result that the chest cavity is enlarged in all its three diameters during inspiration. The first rib is fixed by muscles from above. During extremely forced inspiration a large proportion of all the muscles of the body may act.
It is a physical exercise requiring considerable effort. It wakes up the diaphragm. It promotes active circulation. It improves digestion. Therefore it has a double value for stimulating the physical as well as the mental functions. I would by all means encourage every inclination towards physical efforts of this sort.
Thus the exercise requires us to take as much breath as possible, to retain it a moment, then slowly give it up and at last to relax completely the diaphragm, all the time sustaining the chest expansion. Preserve still the quadruple rhythm.
I announced, too, the disappearance of the diaphragm; and we bewailed together the loss of that servant of the good old times, whose touching history you must, I am sure, remember. But I reckoned without this wretched crocodile, who seems determined to give the lie to all we have been saying.
In infants the action of the diaphragm is marked, and the movements of the abdomen are especially obvious. This is called abdominal breathing. In women the action of the ribs as they rise and fall, is emphasized more than in men, and this we call costal breathing.
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