| Precise coordination of the closure of the glottis and the action of the vocal cords produces the voice. |
| In bulbar patients, a nonfunctioning glottis can cause an uncomfortable choking sensation, making mouth pressure measurements difficult. |
| Interestingly, Valsalva maneuvers against pinched nostrils and closed glottis did, however, produce upward deflection of the eyes. |
| Then the blunt wire was introduced inside the trachea when the glottis was open. |
| The glottis suddenly closes and stops the inflow of air resulting in the sound of a hiccup. |
| The closed shutter maneuver was performed with the subject's glottis open and the cheeks held firmly with his hands. |
