Disturbances In Astronauts With Optical Stimuli Using Virtual - - PowerPoint PPT Presentation

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Disturbances In Astronauts With Optical Stimuli Using Virtual - - PowerPoint PPT Presentation

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Simulating Vestibular Disturbances In Astronauts With Optical Stimuli Using Virtual Reality Matthew Noyes Software Lead/Hybrid Reality Lab National Aeronautics and Space Administration (NASA) Marissa Rosenberg & Frank Delgado Galen

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Simulating Vestibular Disturbances In Astronauts With Optical Stimuli Using Virtual Reality

Matthew Noyes Software Lead/Hybrid Reality Lab National Aeronautics and Space Administration (NASA) Marissa Rosenberg & Galen Kreutzberg Senior Scientist & Engineer KBRwyle Frank Delgado Project Lead/Hybrid Reality Lab NASA

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Real Virtual Hybrid Reality

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INTRODUCTION

  • Astronauts perceive linear motion on head tilt
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OpenStax College, Illustrations from Anatomy & Physiology, Connexions Web site. http://cnx.org/content/col11496/1.6/, Jun 19, 2013.

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INTRODUCTION

  • Astronauts perceive linear motion on head tilt
  • Motion sickness/disorientation = egress risk
  • Water landings are especially dangerous
  • A sensorimotor countermeasure can lower

risk

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Can Hybrid Reality be a sensorimotor countermeasure?

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STUDY OVERVIEW

  • 10 subjects (32.3 p/m 5.3 years, 5 males)
  • Each subject performed 4 sessions

30

15 Session Length (min)

Extra or Intra Vehicular Activity Initial Test Acclimation Period mG

Martian Gravity

Final Test

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STUDY OVERVIEW

A B D C

Non-ARGOS ARGOS

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STUDY OVERVIEW

ARGOS Non-ARGOS

A B D C

HRMP Non-HRMP

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What is HRMP?

  • Hybrid Reality-induced Motion

Perception

  • Translating checkerboard pattern

tied to head rotation

  • Creates vection
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STUDY OVERVIEW

ARGOS Non-ARGOS HRMP Non-HRMP

A B C D

Phase 1: Microgravity Phase 2: Martian Gravity

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Theoretical Basis

Vision Otolith

Proprioception

Brain Stem

Brain

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Tools OpenVR OpenGL Fragment Shader NVIDIA Falcor

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Tandem Walk Results

  • Generalized Mixed Effects Model (binomial distribution, %correct)
  • Fixed Effects

Initial– Effect of the first trial without ARGOS, no HRMP, eyes open Eyes Closed – Effect of eyes closed without ARGOS, no HRMP, second trial HRMP – Effect of HRMP without ARGOS, the second trial, with eyes open ARGOS:Eyes Closed – Effect of ARGOS without HRMP with eyes closed on second trial ARGOS:HRMP – Effect of ARGOS with HRMP with eyes open on second trial HRMP:Eyes Closed – Effect of HRMP with eyes closed no ARGOS second trial

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Decreasing likelihood of correct step Increasing likelihood of correct step

  • 1
  • 0.5

0.5 1 1.5 2 2.5

Tandem Walk Effectiveness Subjected Condition

Effect on Tandem Walk Performance by Condition

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Theoretical Basis

Vision Otolith

Proprioception

Brain Stem

Brain

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Theoretical Basis

Vision Otolith

Proprioception

Brain Stem

Brain

HRMP

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Theoretical Basis

Vision Otolith

Proprioception

Brain Stem

Brain

HRMP

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Future Work

  • 3D optical flow
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Future Work

  • Improved Otolith model
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Future Work

  • Eyetracking
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Future Work

  • Hybrid Reality

Obstacle Course

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Future Work

  • On-Orbit Countermeasure
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Commercial Applications

  • Senior Care
  • Neurological Disease
  • Blast-Related Traumatic Brain

Injury

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Acknowledgments

  • Marissa Rosenberg, Galen Kreutzberg,

Millard Reschke (JSC Neuroscience Lab)

  • Zvi Greenstein & Anjul Patney (NVIDIA)
  • Adriel Arias (NASA)
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Thank You

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NASA Hybrid Reality Lab Contacts

Project Lead francisco.j.delgado@nasa.gov Software Lead matthew.noyes@nasa.gov

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NASA Hybrid Reality Lab Contacts

Questions

Project Lead francisco.j.delgado@nasa.gov Software Lead matthew.noyes@nasa.gov