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PREVENTION OF MOTION SICKNESS IN THE SLOW ROTATION ROOM BY INCREMENTAL INCREASES IN STRENGTH OF STIMULUS
Pages 109-116

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From page 109...
... Thus, control of the stressor is exercised through regulation of the room's angular velocity, which is accomplished accurately and without difficulty, and control over head rotations, which is not so readily accomplished in the active subject. With regard to the latter, the experimenter exercises control by requesting the subject either to fixate his head, to carry out tasks involving stressful head rotation, or to execute standardized head motions.
From page 110...
... . The initial speed of rotation was 2 rpm, after which there were nine unit increases in velocity, with dwell times of 2 days at each level except terminal velocity (10 rpm)
From page 111...
... 14) in which the dwell time at each incremental increase in velocity of the SRR was determined by the capacity of the subject to make a given number of standardized head motions generating TABLE 2.-Susceptibility to Acute SRR Sickness (Dial Test)
From page 112...
... None had any significant loss in hearing, all had normal threshold caloric tests responses and ocular counterrolling indices, and scores made on postural equilibrium tests (refs.
From page 113...
... during activities involving omnidirectional head rotations of maximal excursion. Experiment II The stress profile of the second experiment, along with a summary of the findings, is shown in figure 3.
From page 114...
... There was evidence of transfer of adaptation acquired at a given angular velocity of the SRR to a higher velocity; also, adaptation acquired through limited head excursions in two planes of arc transferred to omnidirectional head motions of unlimited excursion, provided a sufficient number of discrete motions had been made. There was some evidence in our studies that overadaptation at 10 rpm minimized or abolished the susceptibility to symptoms on cessation of rotation, suggesting a "general suppression" effect with the exception that it was direction specific; adaptation in a clockwise direction increased susceptibility to symptoms during exposure to a counterclockwise rotation.
From page 115...
... R.; AND COLEHOUR, J K.: Prevention of Overt Motion Sickness by Incremental Exposure to Otherwise Highly Stressful Coriolis Accelerations.
From page 116...
... The last 2 days were spent in the molds without complaints, and they remained in the molds for a day and a half following cessation of rotation. Soon after rotation ceased, mild symptoms of motion sickness appeared on making head movements.


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