OBJECTIVES:
This study will investigate adaptive changes in spatial orientation after long-duration space flight by measuring eye and arm movements pointed in the “straight-ahead” direction as perceived by the test subject.

Specific objectives include: (a) fixation of actual and imagined target locations at different distances; (b) eye and arm movements along head or trunk directions; and (c) the vestibulo-ocular reflex during translation motion with fixation targets at different distances.

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Crew health and performance is critical to successful human exploration beyond low Earth orbit. The Human Research Program (HRP) investigates and mitigates the highest risks to human health and performance, providing essential countermeasures and technologies for human space exploration. Risks include physiological and performance effects from hazards such as radiation, altered gravity, and hostile environments, as well as unique challenges in medical support, human factors, and behavioral health support. The HRP utilizes an Integrated Research Plan (IRP) to identify the approach and research activities planned to address these risks, which are assigned to specific Elements within the program. The Human Research Roadmap is the web-based tool for communicating the IRP content.

The Human Research Roadmap is located at: https://humanresearchroadmap.nasa.gov/