title: Improvement of hemispatial neglect by a see-through head-mounted display: a preliminary study.
abstract: BACKGROUND
  Patients with right hemisphere damage are often unaware of, inattentive to and fail to interact with stimuli on their left side. This disorder, called hemispatial neglect, is a major source of disability. Inducing leftward ocular pursuit by optokinetic stimulation (OKS) relieves some of the signs of unilateral neglect. However, it is difficult to provide patients with a continuously moving background that is required for OKS. We studied whether OKS projected onto a see-through head-mounted display (HMD) would help treat neglect.
  
  
  METHODS
  14 patients with neglect after cerebral infarction performed line bisections on a computer screen, both with and without OKS that was either delivered by the HMD or on the same screen that was displaying the lines that were to be bisected.
  
  
  RESULTS
  The line bisection performances were significantly different in the four conditions (P < 0.001). The post hoc analyses indicated that the rightward deviation observed in the control conditions on the line bisection tasks without OKS, improved significantly with the use OKS in both the HMD and screen conditions (α < 0.05). The results between the screen and HMD conditions were also different (α < 0.05). The OKS in the HMD condition corrected patients' rightward deviation more toward the actual midline than did the OKS provided during the screen condition.
  
  
  CONCLUSIONS
  OKS projected onto the see-through HMD improved hemispatial neglect. The development of a portable device may aid in the treatment of neglect.
authors.affiliation: Department of Neurology, Dementia Center, Ilsan hospital, National Health Insurance Service, Goyang, South Korea. jh7521@naver.com.
authors.forename: Jong Hun
authors.initials: JH
authors.lastname: Kim
authors.affiliation: Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, 50 Irwon-dong, Gangnam-gu, Seoul, 135-710, South Korea. byuryhan@hanmail.net.|Neuroscience Center, Samsung Medical Center, Seoul, South Korea. byuryhan@hanmail.net.
authors.forename: Byung Hwa
authors.initials: BH
authors.lastname: Lee
authors.affiliation: Dr. Hwang's Neurology clinic, Suncheon, South Korea. goneuro@paran.com.
authors.forename: Seok Min
authors.initials: SM
authors.lastname: Go
authors.affiliation: Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, 50 Irwon-dong, Gangnam-gu, Seoul, 135-710, South Korea. sangwonseo@empas.com.|Neuroscience Center, Samsung Medical Center, Seoul, South Korea. sangwonseo@empas.com.|Department of Clinical Research Design and Evaluation, SAIHST, Sungkyunkwan University, Seoul, South Korea. sangwonseo@empas.com.
authors.forename: Sang Won
authors.initials: SW
authors.lastname: Seo
authors.affiliation: Department of Neurology, University of Florida and Veterans Affairs Medical Center, Gainesville, FL, USA. heilman@neurology.ufl.edu.
authors.forename: Kenneth M
authors.initials: KM
authors.lastname: Heilman
authors.affiliation: Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, 50 Irwon-dong, Gangnam-gu, Seoul, 135-710, South Korea. dukna@skku.edu.|Neuroscience Center, Samsung Medical Center, Seoul, South Korea. dukna@skku.edu.|Department of Health Sciences and Technology, SAIHST, Sungkyunkwan University, Seoul, South Korea. dukna@skku.edu.
authors.forename: Duk L
authors.initials: DL
authors.lastname: Na
mesh_terms: D000328:Adult; D000368:Aged; D002544:Cerebral Infarction / Q000150:complications / Q000534:rehabilitation; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010468:Perceptual Disorders / Q000209:etiology / Q000534:rehabilitation*; D010775:Photic Stimulation / Q000295:instrumentation* / Q000379:methods*