UMN vs LMN lesion XII, neuro resources

[P0ke]

Is there a way to distinguish say a left-sided LMN lesion of XII vs a right-sided UMN lesion of XII? Both would deviate the tongue to the left. Also, what are some good neuro resources, ie. Practice questions, summaries, etc.

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[Hangry]

MRI

But seriously I don't think this distinction matters for most cranial nerves at the medical student level. The only cranial nerve lesion I can think of where upper vs lower mattered was the facial nerve.

 

[MedicaMagus]

Don't fasciculations and muscle wasting in the tongue help you differentiate between an UMN and LMN lesion on opposite sides?

 

[LLCoolK]

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