The Vagus Nerve (CN X) is the main nerve of the parasympathetic system. It is assessed together with CN IX, the glossopharyngeal nerve. No diagnostic accuracy studies are available on these assessments so the clinical value is unknown.
The patient may report having difficulties swallowing so asking the patient to take a sip on your command can be used as one assessment. You’d expect no delay or difficulty swallowing once you ask the patient to take a sip.
Furthermore ask the patient to say “aah” with the mouth wide open and check if the uvula elevates, inspect the palate for symmetry as well.
Examine the patient’s voice and cough. A hoarse voice or bovine cough can be indicative of vagus nerve impairment due to a lack of closing of the vocal cords creating a hollow sound.
Lastly, the gag reflex can be assessed. Using a tongue depressor touch the back of the tongue on both sides and check for a gag reflex. Alternatively use a wisp of cotton and touch the soft palate.
21 OF THE MOST USEFUL ORTHOPAEDIC TESTS IN CLINICAL PRACTICE
Learn more about the assessment of all cranial nerves below:
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