English
Gag reflex
Introduction
Introduction Use the tongue depressor to gently touch the posterior pharyngeal wall, which normally causes nausea to reflex (pharyngeal muscle contraction). The reflection center is in the medulla. Those with nerve damage are slow or disappear. Pharyngeal reflex is a physiological reaction that prevents the swallowing of foreign bodies. When the toothbrush is put in the mouth and brushing the teeth, it will also involuntarily appear "retching", which is caused by pharyngeal reflex.
Cause
Cause
Causes of pharyngeal reflex
It is a physiological reaction that prevents the swallowing of foreign bodies, and the reflex center is in the medulla.
Examine
an examination
Related inspection
Otolaryngology CT examination of nervous system examination
Pharyngeal reflex examination
Use the tongue depressor to gently touch the posterior pharyngeal wall, which normally causes nausea to reflex (pharyngeal muscle contraction). The reflection center is in the medulla. Those with nerve damage are slow or disappear.
Diagnosis
Differential diagnosis
Symptoms of pharyngeal reflex
Hypertrophic pharyngeal reflex: specific manifestation of atrophy of the tongue muscle, eating cough, drinking water from the nostrils, speech speech is unclear, hoarseness, often accompanied by head lateral weakness; pharyngeal reflex disappears, soft palate does not move, lingual muscle twitch .
Pharyngeal reflex disappeared: hoarseness, dysphagia, dysphagia, loss of pharyngeal sensation, pharyngeal reflex disappeared, often accompanied by lingual muscle atrophy, called medullary paralysis. More common in encephalitis, polio, polyneuritis, nasopharyngeal cancer metastasis.
Use the tongue depressor to gently touch the posterior pharyngeal wall, which normally causes nausea to reflex (pharyngeal muscle contraction). The reflection center is in the medulla. Those with nerve damage are slow or disappear.
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