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Thresholds for detection of linear oscillation following prolonged weightlessness
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Reschke, M. F. Homick, J. L. Parker, D. E. Lichtenberg, B. K. Arrott, A. P. |
| Organization | The National Aeronautics and Space Administration (NASA) |
| Copyright Year | 1985 |
| Abstract | Linear self motion detection thresholds, which were recorded as part of the European vestibular Experiments, varied across subjects. This variability is consistent with observations following the STS-8 and STS-11 Shuttle missions. Three astronauts who participated in the STS-8 and STS-11 (41-B) missions served as subjects in this experiment. Nominal amplituudes of parallel swing motion were determined by recording the displacement of a pointer attached to the swing bed relative to a scale taped to the floor. These nominal amplitudes were compared with those determined with a three axis accelerometer and strip chart recorder. The subject indicated his perception of self motion (yes or no) by manipulations of a joystick that was connected to one channel of the strip chart recorder. A small signal lamp was mounted on an ear pad support and was controlled by the experimenter's hand held microswitch. Prolonged weightlessness appeared to produce elevated self motion detection thresholds in one astronaut. However, a similar threshold elevation was not obtained from the other two astronauts. The basis for this discrepancy is unknown but it may be related to altered detection threshold criteria on the part of the astronaut who exhibited the threshold change. Failure to record threshold changes following prolonged weightlessness is consistent with the researcher's otolith tilt translation reinterpretation hypothesis. This hypothesis suggests that the sensitivity of the otolith receptors is not altered by weightlessness; rather the way in which the brain interprets otolith information is changed. |
| File Size | 153416 |
| File Format | |
| Alternate Webpage(s) | http://www.archive.org/details/nasa_techdoc_19850023497 |
| Archival Resource Key | ark:/13960/t01z4xq4s |
| Language | English |
| Publisher Date | 1985-03-01 |
| Access Restriction | Open |
| Subject Keyword | Algorithms Trajectory Control Computerized Simulation Flight Control Onboard Data Processing Time Trajectory Optimization Flight Optimization Onboard Equipment Perturbation Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
