In reality this aerophagic tic is a symptom-complex encountered in very different pathological conditions. No doubt its frequency is greatest and its development highest in hysteria, but we are in error if we suppose that it is the exclusive appurtenance of that disease: its occurrence in our case of general paralysis is evidence to the contrary. I have noted it where there was not the slightest suspicion of hysterical antecedents. Nevertheless its relation to pathological mental states of some form or another is invariable.
It is often found in cases of insanity of the obsessional or of some other type.
I have had an opportunity (says Séglas) of observing an instance of aerophagia in a woman of fifty-four years, who for the last fifteen years has been suffering from hypochondriasis in a delusional form. She believes she has a hole in her head, and that her brain is gangrenous; she is no longer conscious of her body, nor of her food as it passes through. "It is like a cupboard empty of everything but air." Grafted on this delusion is an aerophagic tic, upon which the patient relies in support of her contentions. So little is she able to withstand its ceaseless repetition that the sequence of muscular actions continues though the tongue be held outside the mouth or fixed with a spoon.
I have seen the same phenomenon in another woman, forty-six years of age, afflicted with fixed and systematised delusions of persecution. She imagined that she was being pursued by sorcerers, who had cast a spell on her and were about to poison her, torture her, break her on the wheel, etc. In addition to very distinct and frequent verbal hallucinations and disorders of general sensibility, she exhibited several tics, one of which consisted in spasmodically closing her eyes, brandishing her right arm, and uttering a string of incomprehensible words; the other was this aerophagic tic, characterised by a jumble of quick swallowing movements, pharyngeal grunts, and long-drawn-out, sonorous eructations. All this performance was rehearsed two or three times a minute as a sort of convulsive discharge, which she alleged the sorcerers forced her to emit in spite of herself, exactly as they coerced her into uttering a jargon she did not understand, and wagged her tongue at their own sweet will.
To quote Séglas again in conclusion:
The air-swallowing tic is merely a syndrome common to various pathological conditions differing widely enough, but all alike in being associated with some degree of mental impairment, in which perhaps may be discovered the actual cause of the condition. It cannot therefore be looked upon as a simple spasm, based anatomically on a reflex arc, but must be regarded as a reaction whose substratum is a cortico-spinal anastomosis—that is to say, it is a tic.
Tics of vomiting may be produced if the diaphragm be affected. Noguès and Sirol[114] have reported the case of a woman with a pharyngo-laryngeal derangement resembling vomiting, except as far as the actual ejection of alimentary matters was concerned. She used to become conscious of a sensation of constriction, and to feel the tickling of a foreign body in the gullet; at this point the slightest pressure on the neck provoked a convulsive attack, in which all the pantomime of vomiting was gone through without the actual emesis taking place.
It is possible, as Noguès and Sirol think, that the trouble may have originated in a reflex spasm, and that with the disappearance of the primary irritation a new psychical factor operated to effect its repetition and prolongation.
The designation of all these functional disorders as tics is not always justifiable, and their separation from the corresponding normal act is frequently a task of delicate diagnosis, but patient search for the exciting cause and study of the concomitant mental anomalies will supply the necessary indications.