Task A non-pharmacological countermeasure suite for motion sickness induced by post-flight water landings (T. Clark)
Last Published:  03/26/21 03:34:00 PM (Central)
Short Title: HMD Artificial Horizon - Lab
Responsible HRP Element: Human Health Countermeasures
Collaborating Org(s):
Funding Status: Active - Currently funded and in progress
Procurement Mechanism(s):
Solicited
Aims:
1) Assess the incidence, severity, and time course of motion sickness resulting from i) simulated microgravity transitions, ii) passive motion mimicking that of the capsule at sea, and iii) the combination of (ii) following (i). To better understand the contributing factors of the unique combination of motion sickness stimuli following water landings, we will systematically assess them in ground-based laboratory experiments using human-rated motion simulators.

2) Evaluate the benefit of external visual references for reducing motion sickness during passive self-motion. In the conditions of SA1, we will assess a series of visual scenarios, comparing cues moving with the subject (as in the interior of the capsule) to Earth-fixed visual cues. We anticipate external visual cues will enable the CNS to predict upcoming motion stimulation, reducing sensory conflict and motion sickness.

3) Investigate the benefit of active postural control during passive self-motion. We will quantify motion sickness with the seated subject a) fully restrained (head and body restrained), b) head unrestrained (but body restrained), c) full torso unrestrained. In conditions b) and c), subjects will be asked to attempt to keep their head/torso upright during the passive motion stimulation. By actively engaging postural control mechanisms, the CNS will anticipate motion and partially control the sensory stimulation, again reducing sensory conflict and motion sickness.
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