ABSTRACT
A 54-year-old man presented with primary position upbeat nystagmus and wall-eyed bilateral internuclear ophthalmoplegia. He also showed bilateral limb ataxia and impaired horizontal gaze. Upbeat nystagmus obeyed Alexander's law and attenuated by visual fixation and disappeared by convergence. Brain magnetic resonance imaging showed acute infarction in the bilateral paramedian midbrain involving the crossing of brachium conjunctivum. Multiple mechanisms including the interruption of central vestibulo-ocular projections from anterior canal may be postulated in upbeat nystagmus of this patient.
Subject(s)
Humans , Middle Aged , Ataxia , Brain , Cerebral Infarction , Infarction , Jurisprudence , Magnetic Resonance Imaging , Mesencephalon , Ocular Motility Disorders , OphthalmoplegiaABSTRACT
No abstract available.
Subject(s)
Glioma , Limbic Encephalitis , Potassium Channels, Voltage-Gated , SeizuresABSTRACT
We report a 43-year old woman patient presented with contralateral trigeminal neuralgia induced by tactile stimulation and mastication after Bell's palsy. Trigeminal neuralgia is characterized by recurrent episodes of intense lancinating pain affecting the face localized to the sensory supply areas of the trigeminal nerve. Increased excitability of facial motor neurons and bainstem interneurons which mediate trigemio-facial reflex are thought to be the cause of contralateral trigeminal neuralgia after Bell's palsy.