![]() However, 10-15 percent of people have a hypersensitive gag reflex (HGR), which continues to get activated by substances in the mouth. Most often, sufferers of HGR gag while eating sticky foods that tend to get stuck in the mouth, such as bananas and mashed potatoes in extreme cases, oversensitive gagging can cause picky eating or even malnourishment. These areas of the brain also control cardiac activity, vomiting, and the salivary glands. Cranial nerve palsies can be congenital or acquired. The brain stem also includes the vagus nerve and medulla oblongata. Summary Cranial nerve palsy is characterized by a decreased or complete loss of function of one or more cranial nerves. In children and adults, the reflex is usually only triggered by the presence of an unusually large object in the back of the throat. Abdominal contractions Retching noises The gag reflex is controlled in the brain stem. The sensation of the spatula is mediated via the IXth cranial nerve. Since the glossopharyngeal nerve innervates the. Every one has a gag, but it becomes a problem when an individual finds it difficult to eat certain foods or perform certain activity. It is tested for by touching the back of the patients pharynx on each side with a spatula. One of the ways to test the functionality of the glossopharyngeal nerve is to test the patients gag reflex. Starting around the 6- or 7-month mark in babies, the gag reflex diminishes, allowing a baby to swallow chunky or solid foods. Hyperactive Gag Reflex: Definition, Description, Causes and Risk Factors: Hyperactive gag reflex is the body’s response to the stimulation of soft palate or posterior pharynx. In the first few months of a baby's life, this reflex is triggered by any food that a region of the brain stem called the "nucleus tractus solitaries" (which is wired to nerve endings in the mouth) judges to be too chunky for a baby's stomach to digest. By thrusting objects in the throat toward the opening of the mouth, the gag reflex expels substances that the brain has deemed harmful.
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