In bulbar patients, a nonfunctioning glottis can cause an uncomfortable choking sensation, making mouth pressure measurements difficult.
The Valsava response occurs when air is forced against a closed glottis (the narrowest part of the larynx, through which air passes into and out of the trachea).
Now one of the alternative pronunciations of which really does involve ‘an aspirating H sound’, that is, noise generated by turbulent flow of air through the glottis .
It is possible that the ‘breath holding’ episodes the child exhibited previously were in fact intermittent and momentary obstruction of the glottis by the tonsil.
The extrinsic muscles of the larynx control the degree of tension on the vocal cords, and the intrinsic muscles regulate the glottis .
To speak Carrier you have to get in touch with your glottis .
The diagnosis is definitively established by visualization of the glottis when the patient is symptomatic.
Hiccups in dogs, just as in people, are caused when a spasm of the muscular diaphragm creates a sudden inhalation followed by a closure of the glottis .
Interestingly, Valsalva maneuvers against pinched nostrils and closed glottis did, however, produce upward deflection of the eyes.
The closed shutter maneuver was performed with the subject's glottis open and the cheeks held firmly with his hands.