Volitional and emotional facial palsy.

 The lesion responsible for the facial asymmetry at rest and weakness of voluntary facial movements in this woman was in the corticobulbar fibers of the internal capsule at the genu. In contrast, the lesion responsible for weakness of emotional movements in the man was in the contralateral thalamus.

https://www.nejm.org/doi/full/10.1056/nejm199805213382105

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