title: Asymmetric visual deficit at high sustained Gz.
abstract: Occasionally, acceleration research personnel see an individual who experiences consistent asymmetric visual deficits at high sustained Gz (HSG). Recently, one such centrifuge research subject from this laboratory was investigated with transcranial Doppler sonography. The results indicate an abnormal circle of Willis which could explain the asymmetric visual deficit at HSG.
authors.affiliation: Defence and Civil Institute of Environmental Medicine, North York, Ontario, Canada.
authors.forename: M A
authors.initials: MA
authors.lastname: Paul
mesh_terms: D000328:Adult; D000337:Aerospace Medicine; D001783:Blood Flow Velocity; D002941:Circle of Willis / Q000000981:diagnostic imaging*; D006112:Gravitation; D006801:Humans; D008297:Male; D009880:Ophthalmic Artery / Q000000981:diagnostic imaging*; D014463:Ultrasonography; D014786:Vision Disorders / Q000000981:diagnostic imaging / Q000209:etiology*