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With one-sided vagal nerve (CN X - motor component) damage, the soft palate will elevate and pull toward the intact side regardless of the side of the pharynx that is touched. This is because the sensory component is intact on both sides, but only the motor nerves supplying one side of the soft palatine and pharyngeal muscles is working ...
The nerve is then tested by sticking the tongue out. If there is damage to the nerve or its pathways, the tongue will usually but not always deviate to one side, due to the genioglossus muscle receiving nerve signals on one side but not the other. [6] [19] When the nerve is damaged, the tongue may feel "thick," "heavy," or "clumsy."
Erythema (redness) and edema (swelling) of papillae on the tip of the tongue may be a sign that the tongue is being habitually pressed against the teeth. The number and size of filiform papillae may be reduced. If the tongue is very red and smooth, then there is likely a local or systemic cause (e.g. erythematous candidiasis, anemia). [5]
Tongue lesions are very common. For example, in the United States one estimated point prevalence was 15.5% in adults. [10] Tongue lesions are more common in persons who wear dentures and tobacco users. [10] The most common tongue conditions are geographic tongue, followed by fissured tongue and hairy tongue. [10]
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When the tongue moves forward (as in a protrusion exercise), it will move to the stronger side. If the person is asked to move their jaw, it will be opposite (toward the weaker side). Other visible signs that accompany flaccid dysarthria include facial or soft palate droop, or nasal regurgitation with eating (again, if the velum is an affected ...
The genioglossus is one of the paired extrinsic muscles of the tongue. It is a fan-shaped muscle that comprises the bulk of the body of the tongue. It arises from the mental spine of the mandible; it inserts onto the hyoid bone, and the bottom of the tongue. It is innervated by the hypoglossal nerve (cranial nerve XII). The genioglossus is the ...
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