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  #1  
Old 10-31-2009
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Neuro Uvula Deviation!

You touch the left side of the pharynx and the patient's uvula deviates to the left and you touch the right side of the pharynx and the patient does not gag. Where is the lesion?
a- Left glossopharyngeal
b- Left vagus and glossopharyngeal
c- Right glossopharyngeal
d- Right vagus and glossopharyngeal
e- Right vugus
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  #2  
Old 10-31-2009
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Default Answer C

Right glossopharyngeal nerve lesion answer C
It serves the sensory part of the gag reflex, that's why the patient did not gag when we touched the right side
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Old 10-31-2009
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Quote:
Originally Posted by cordoba View Post
Right glossopharyngeal nerve lesion answer C
It serves the sensory part of the gag reflex, that's why the patient did not gag when we touched the right side
Your answer is not correct
If it is only the right glossopharyngeal then why the uvula deviated when we touched the left side? think about it
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Old 10-31-2009
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When the patient uvula deviates to the left it means a right sided vagus motor lesion.
When the gag is absent on the right it means the right glossopharyngeal is also not functioning

Answer is D
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Old 12-03-2009
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Quote:
Originally Posted by GNND85 View Post
When the patient uvula deviates to the left it means a right sided vagus motor lesion.
When the gag is absent on the right it means the right glossopharyngeal is also not functioning

Answer is D
Correct
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Old 03-01-2010
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Thumbs Up Nice

I liked this question
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Old 09-12-2010
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deviation of uvula to left means rt vagus nerve lesion but i want to ask if we touched rt side and no gag reflex why is glossopharyngeal it could be either glossophayngeal(afferent) or vagus(efferent)
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Old 09-12-2010
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Cool Because there was a gag on the left side

Quote:
Originally Posted by Okasha2013 View Post
deviation of uvula to left means rt vagus nerve lesion but i want to ask if we touched rt side and no gag reflex why is glossopharyngeal it could be either glossophayngeal(afferent) or vagus(efferent)
Because when you touched the left side there was a gag (though a deviated one) which means that the left glossopharyngeal is working. But when you touched the right side there's was no gag at all (which means the afferent limb is cut).
Remember that afferent glossopharyngeal goes unilaterally to the brains stem and then it comes back "bilaterally" to both vagus nerves on both sides.
In this case it was the ability to elicit the gag on the left side that helped us to understand that the absent right sided gag is actually sensory not motor.
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