Four astronauts experienced passive whole-body rotation in a number of test sessions during a 7-day orbital mission. Pitch (Y-axis) and roll (X-axis) rotation required subject orientations on the rotator in which the otolith system was at radius of 0.5 m. Thus subjects experienced a constant -0.22 Gz stimulus to the otoliths during the 60 s constant-velocity segments of "pitch" and "roll" ramp profiles. The Gz stimulus, a radius-dependent vector ranging from -0.22 Gz at the otoliths to +0.36 Gz at the feet, generated sensory information that was not interpreted as inversion in any of the 16 tests carried out in flight (12 in pitch and 4 in roll orientation). None of the subjects was rotated with head off-center during the first 33 h of the mission. In the state of orbital adaptation of these subjects, a -0.22 Gz otolith stimulus did not provide a vertical reference in the presence of a gradient of +Gz stimuli to the trunk and legs.


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    Titel :

    Microgravity vestibular investigations: perception of self-orientation and self-motion


    Beteiligte:
    Benson, A. J. (Autor:in) / Guedry, F. E. (Autor:in) / Parker, D. E. (Autor:in) / Reschke, M. F. (Autor:in)


    Erscheinungsdatum :

    01.11.1997



    Medientyp :

    Sonstige


    Format :

    Keine Angabe


    Sprache :

    Englisch




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