title: Clinical applications of correlational vestibular autorotation test.
abstract: CONCLUSIONS
  The correlational vestibular autorotation test (VAT) system has the advantages of good test-retest reliability and calibrations of absolute degrees of eye movement are unnecessary when acquiring a cross correlation coefficient (CCC). The approach is able to efficiently detect peripheral vestibulopathies.
  
  
  OBJECTIVE
  A VAT has some drawbacks including poor test-retest reliability and slippage of sensor. This study aimed to develop a correlational VAT system and to evaluate the reliability and applicability of this system.
  
  
  METHODS
  Twenty healthy participants and 10 vertiginous patients were enrolled. Vertical and horizontal autorotations from 0 to 3 Hz with either closed or open eyes were performed. A small sensor and a wireless transmission technique were used to acquire the electro-ocular graph and head velocity signals. The two signals were analyzed using CCCs to assess the functioning of the vestibular ocular reflex (VOR).
  
  
  RESULTS
  The results showed a significantly greater CCC for open-eye versus closed-eye of head autorotations. The CCCs also increased significantly with head rotational frequencies. Moreover, the CCCs significantly correlated with the VOR gains at autorotation frequencies ≥1.0 Hz. The test-retest reliability was good (intraclass correlation coefficients ≥0.85). The vertiginous participants had significantly lower individual CCCs and overall average CCC than age- and-gender matched controls.
authors.affiliation: Institute of Brain Science, School of Medicine, National Yang-Ming University.
authors.forename: Li-Chun
authors.initials: LC
authors.lastname: Hsieh
authors.forename: Te-Ming
authors.initials: TM
authors.lastname: Lin
authors.forename: Yu-Min
authors.initials: YM
authors.lastname: Chang
authors.forename: Terry B J
authors.initials: TB
authors.lastname: Kuo
authors.forename: Gho-She
authors.initials: GS
authors.lastname: Lee
mesh_terms: D000328:Adult; D000368:Aged; D016022:Case-Control Studies; D004585:Electrooculography; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D014724:Vestibular Function Tests / Q000379:methods*; D020338:Vestibular Neuronitis / Q000175:diagnosis*; D055815:Young Adult
keywords: Cross correlational analysis; electro-oculography; gyrometry; intraclass correlation