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Symposium on the Role of the Vestibular Organs in Space Exploration (1970) / Chapter Skim
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THRESHOLDS FOR THE PERCEPTION OF ANGULAR ACCELERATION ABOUT THE THREE MAJOR BODY AXES
Pages 299-306

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From page 299...
... 2) , using single nerve fiber preparations in the ray, reported that the vertical canals can be directly stimulated by rotation in any plane, whereas the horizontal semicircular canals are stimulated almost exclusively by rotation about a vertical axis.
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From page 300...
... This brief survey of the literature makes it clear that definitive data regarding the sensitivity of man to rotation about his three major body axes are lacking. Adequate findings regarding the sensitivity in these three body planes have implications for the theoretical formulation of the behavior of the semicircular canal system.
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From page 301...
... Preliminary practice sessions preceded the regular observations of the perception of rotation at each of the three body positions. The observers were given knowledge of results in the preliminary practice trials, but during the regular trials they had no knowledge of results.
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From page 302...
... Body position -- 0-T0-C ^ Observer Threshold order Axis of rotation X y z 1 xyz 0.19 0.06 1.04 .18 .82 .64 .12 .61 .22 .58 1.03 2.24 .59 .38 .56 .68 .42 .31 1.50 0.27 .73 .49 .27 .87 .17 .60 .33 .39 .45 .47 .34 .30 .61 .41 .21 .17 .32 2 yzx xzy yxz zxy zyx xyz zxy zyx yzx yxz xzy xyz yzx zxy yxz xzy zyx .43 .36 .40 .17 .20 .33 .51 .45 .32 .55 .45 1.02 .37 .78 .26 .26 .25 3 4 5 6 7 8 9 10 11. 12 13 14 15 16 17 18 Mean thresho Median thresl Standard devi d(A'=18)
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From page 303...
... . For example, visual targets affect vestibular sensitivity: general level of alertness influences vestibular effects; body tilt influences the perception of the visual vertical; and angular acceleration affects visual and auditory localization.
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From page 304...
... 16. VAN DER Vis, K.: Cupulometry of the Vertical Semicircular Canals.
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From page 305...
... D.; AND BRADY, J F.: A Comparison of Performances Involving Head Rotations About y and z Cranial Axes in a Revolving Space Station Simulator.
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Key Terms

  • body axes
  • semicircular canals
  • major body
  • vertical canals
  • body position

  • angular accelerations
  • horizontal canals
  • mean thresholds
  • oculogyral illusion
  • mean threshold

  • vertical axis
  • body positions
  • vertical semicircular
  • statistical significance
  • horizontal semicircular

  • van der
  • preliminary practice
  • der vis
  • jose state
  • accelerations produced

  • state college
  • accelerations applied
  • ames research
  • san jose
  • yxz xzy

  • direct comparisons
  • definitive data
  • somersaulting axis
  • zxy zyx
  • perceptible angular


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