SECT. XIX.—ON VOCIFERATION, OR THE EXERCISE OF THE VOICE.
In the exercise of the voice, regular and gentle modulation can contribute nothing to health, but the utterance of louder tones is beneficial, and is therefore to be practised. For, much air being inhaled thus by respiration expands the chest and stomach, and dilates and extends all the pores of the body. Wherefore, even in reading, it promotes the excretion of redundant humours, to those who read in a high tone, by inducing sweats; while in those who read with a moderate tone it promotes the insensible perspiration over the whole frame. For by attenuating the excrementitious matters which are hawked up, the saliva, mucus, and phlegm are discharged and consumed. And to those who stand in need of warming, on account of their frigidity, what mode of relief can be more proper than the action of respiration? Such persons ought therefore to read frequently, and, relaxing the whole body, so as to distend the windpipe and all the other passages of air, endeavour to utter the loudest sounds. And yet we must not have recourse to the exercise of the voice rashly, and without consideration, nor when the system is filled with depraved humours, or the stomach loaded with crudities, lest noxious vapours be thereby distributed over the whole body.
Commentary. These remarks of our author are very pertinent; But Oribasius has given a more comprehensive view of the subject, from the works of Antyllus. He thus describes the mode of performing vociferation: The bowels being evacuated, the person’s body is to be first rubbed, and then the inferior parts and the face are to be sponged with water. He is to begin talking, at first, in a moderate tone, while at the same time he walks about, and afterwards, straining his voice to a louder tone, he is to repeat certain verses. (Med. Collect. vi.)
Plutarch gives nearly the same account of it. He commends vociferation as giving strength to the internal parts, increasing the vital heat, purifying the veins, attenuating the blood, and dispelling the humours. He cautions, however, not to strain the voice to too great a pitch, lest it occasion rupture of any of the vessels. (De Sanit. tuendâ.)
Vociferation, according to Aëtius, is an exercise of the chest and the organs of speech, improving the vital heat; attenuating and strengthening the solid parts of the body. He recommends it for the cure of asthma, orthopnœa, phthisical and chronic pains of the chest, or apostemes when they burst; also, in tertian intermittents, and affections of the stomach attended with vomiting. It is unsuitable, he says, in complaints of the head. (iii, 5.)
Celsus recommends loud reading for curing weakness of the stomach. (i, 8.)
Galen scarcely takes any notice of vociferation, except that, in one place, he states that it exercises the chest and lungs. (De Sanit. tuendâ, ii, 11.)
Avicenna, in giving an account of vociferation, follows Aëtius. He says, that it exercises the parts about the mouth and chest; and hence, that it improves the complexion. He likewise cautions us not to prolong loud enunciation, lest it occasion a rupture of the vessels. He directs us to begin moderate, and then strain the voice gradually, and afterwards to allow it to sink by degrees, (i, 3, 2.)