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One such reflex is a cough. This is typically triggered when the larynx senses that something has penetrated this upper portion of the airway. The cough, then, acts as a protective mechanism, serving to cough out or expel something at risk for being inhaled. There are normal reflexive thresholds or âtriggersâ that exist in the larynx. When these thresholds are lowered (i.e., more sensitive), less stimulation is required to trigger a cough.
A sneeze is a reflexive action usually produced by your body in response to an irritant in the nasal mucosa. However, all reflexes have thresholds. Similar to the knee jerk when the doctor hits it with a little rubber hammer, we sneeze when dust or other irritants stimulate specific areas of nasal tissue. When those areas inside your nasal cavity and sinuses are stimulated, a signal is then sent to your brain.