Assessment of visual space recognition of patients with unilateral spatial neglect and visual field defects using a head mounted display system

Shunichi Sugihara, Toshiaki Tanaka, Tomoya Miyasaka, Takashi Izumi, Koichi Shimizu

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

[Purpose] The purpose of this study was the development of a method for presenting diverse visual information and assessing visual space recognition using a new head mounted display (HMD) system. [Subjects] Eight patients: four with unilateral spatial neglect (USN) and four with visual field defects (VFD). [Methods] A test sheet was placed on a desk, and its image was projected on the display of the HMD. Then, space recognition assessment was conducted using a cancellation test and motion analysis of the eyeballs and head under four conditions with images reduced in size and shifted. [Results] Leftward visual search was dominant in VFD patients, while rightward visual search was dominant in USN patients. The angular velocity of leftward eye movement during visual search of the right sheet decreased in both patient types. Motion analysis revealed a tendency of VFD patients to rotate the head in the affected direction under the left reduction condition, whereas USN patients rotated it in the opposite direction of the neglect. [Conclusion] A new HMD system was developed for presenting diverse visual information and assessing visual space recognition which identified the differences in the disturbance of visual space recognition of VFD and USN patients were indicated.

Original languageEnglish
Pages (from-to)332-338
Number of pages7
JournalJournal of Physical Therapy Science
Volume28
Issue number2
Publication statusPublished - 2016 Feb 1
Externally publishedYes

Keywords

  • Unilateral spatial neglect
  • Visual field defects
  • Visual space recognition

ASJC Scopus subject areas

  • Physical Therapy, Sports Therapy and Rehabilitation

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