title: Ping-pong gaze in a patient with bilateral hemispheric ischemic stroke: case report and video.
abstract: Ping-pong gaze (PPG) is a rare eye movement abnormality consisting of conjugate smooth rhythmical horizontal eye deviations between the 2 extreme positions. PPG is encountered in cases of severe bilateral hemispheric or posterior fossa brain damage with intact brain stem and more rarely during drug toxicity. In this brief video case report, we present a 91-year-old woman with PPG after sustaining bilateral hemispheric ischemic stroke. We also present the neuroanatomic substrates of PPG along with its main saccadic variant, and we coin the hypothesis that PPG actually represents the paralysis of eye saccades.
authors.affiliation: Department of Neurology, 417 Army Share Fund Hospital, Athens, Greece.
authors.forename: Kostas
authors.initials: K
authors.lastname: Sotiriou
authors.affiliation: Department of Neurology, 417 Army Share Fund Hospital, Athens, Greece. Electronic address: kmwartem@yahoo.com.
authors.forename: Artemios K
authors.initials: AK
authors.lastname: Artemiadis
authors.affiliation: Department of Neurology, 417 Army Share Fund Hospital, Athens, Greece.
authors.forename: Ioannis
authors.initials: I
authors.lastname: Papanastasiou
mesh_terms: D000369:Aged, 80 and over; D054022:Cerebrum / Q000098:blood supply*; D017809:Fatal Outcome; D005260:Female; D006801:Humans; D015835:Ocular Motility Disorders / Q000175:diagnosis / Q000209:etiology* / Q000503:physiopathology; D012438:Saccades; D020521:Stroke / Q000150:complications* / Q000175:diagnosis / Q000628:therapy; D014057:Tomography, X-Ray Computed
keywords: Ping-pong; eye movements; gaze; periodic alternating; saccades