An Augmented Reality Hand-Eye Sensorimotor Impairment Assessment for Spaceflight Operations.

Allred, Aaron R; Weiss, Hannah; Clark, Torin K; Stirling, Leia

ABSTRACT

INTRODUCTION:

Following a transition from microgravity to a gravity-rich environment (e.g., Earth, Moon, or Mars), astronauts experience sensorimotor impairment, primarily from a reinterpretation of vestibular cues, which can impact their ability to perform mission-critical tasks. To enable future exploration-class missions, the development of lightweight, space-conscious assessments for astronauts transitioning between gravity environments without expert assistance is needed.

METHODS:

We examined differences in performance during a two-dimensional (2D) hand-eye multidirectional tapping task, implemented in augmented reality in subjects (N = 20) with and without the presence of a vestibular-dominated sensorimotor impairment paradigm the binaural bipolar application of a pseudorandom galvanic vestibular stimulation (GVS) signal. Metrics associated with both the impairment paradigm and task performance were assessed.

RESULTS:

Medial-lateral sway during balance on an anterior-posterior sway-referenced platform with eyes closed was most affected by GVS (effect size 1.2), in addition to anterior-posterior sway (effect size 0.63) and the vestibular index (effect size 0.65). During the augmented reality task, an increase in time to completion (effect size 0.63), number of misses (effect size 0.52), and head linear accelerations (effect size 0.30) were found in the presence of the selected GVS waveform.

DISCUSSION:

Findings indicate that this multidirectional tapping task may detect emergent vestibular-dominated impairment (near landing day performance) in astronauts. Decrements in speed and accuracy indicate this impairment may hinder crews' ability to acquire known target locations while in a static standing posture. The ability to track these decrements can support mission operations decisions.Allred AR, Weiss H, Clark TK, Stirling L. An augmented reality hand-eye sensorimotor impairment assessment for spaceflight operations. Aerosp Med Hum Perform. 2024; 95(2)69-78.