title: Eight-and-a-half syndrome: a rare presentation of pontine infarction.
abstract: "Eight-and-a-half" syndrome is "one-and-a-half" syndrome (conjugated horizontal gaze palsy and internuclear ophthalmoplegia) plus ipsilateral fascicular cranial nerve seventh palsy. This rare condition, particularly when isolated, is caused by circumscribed lesions of the pontine tegmentum involving the abducens nucleus, the ipsilateral medial longitudinal fasciculus, and the adjacent facial colliculus. Its recognition is therefore of considerable diagnostic value. We report a case of a 65-year-old man who presented with eight-and-a-half syndrome in which brain magnetic resonance imaging scan revealed a lacunar pontine infarction.
authors.affiliation: Department of Neurology, Narayana Medical College, Nellore, Andhra Pradesh, India. Electronic address: padala6487@gmail.com.
authors.forename: N S
authors.initials: NS
authors.lastname: Sampath Kumar
authors.affiliation: Department of Neurology, Narayana Medical College, Nellore, Andhra Pradesh, India.
authors.forename: C Govinda
authors.initials: CG
authors.lastname: Raju
authors.affiliation: Department of Neurology, Narayana Medical College, Nellore, Andhra Pradesh, India.
authors.forename: P Ravi
authors.initials: PR
authors.lastname: Kiran
authors.affiliation: Department of Neurology, Narayana Medical College, Nellore, Andhra Pradesh, India.
authors.forename: T Anil
authors.initials: TA
authors.lastname: Kumar
authors.affiliation: Department of Neurology, Narayana Medical College, Nellore, Andhra Pradesh, India.
authors.forename: B Venu
authors.initials: BV
authors.lastname: Gopal
authors.affiliation: Department of Neurology, Narayana Medical College, Nellore, Andhra Pradesh, India.
authors.forename: D Bala
authors.initials: DB
authors.lastname: Khaseem
mesh_terms: D000368:Aged; D005158:Facial Paralysis / Q000175:diagnosis* / Q000473:pathology; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D009886:Ophthalmoplegia / Q000175:diagnosis* / Q000473:pathology; D011149:Pons / Q000473:pathology*; D059409:Stroke, Lacunar / Q000175:diagnosis* / Q000473:pathology; D013577:Syndrome
keywords: Eight-and-a-half syndrome; abducens nucleus; facial colliculus; infarct; medial longitudinal fasciculus; pons