Foville's syndrome is caused by the blockage of the perforating branches of the basilar artery in the region of the brainstem known as the pons.
Structures affected by the infarct are the PPRF, nuclei of cranial nerves VI and VII, corticospinal tract, medial lemniscus, and the MLF.
This produces ipsilateral horizontal gaze palsy and Bell's Palsy and contralateral hemiparesis, hemisensory loss, and internuclear ophthalmoplegia.
Spinocerebellar ataxia (Friedreich's ataxia, Ataxia telangiectasia, Hereditary spastic paraplegia)
Dystonia/Dyskinesia (Spasmodic torticollis, Meige's, Blepharospasm)
Essential tremor - Myoclonus - Lafora
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