Abstract
In this study locomotor and gaze dysfunction commonly observed in astronauts following spaceflight were modeled using two Galvanic vestibular stimulation (GVS) paradigms: (1) pseudorandom, and (2) head-coupled (proportional to the summed vertical linear acceleration and yaw angular velocity obtained from a head-mounted Inertial Measurement Unit). Locomotor and gaze function during GVS were assessed by tests previously used to evaluate post-flight astronaut performance; dynamic visual acuity (DVA) during treadmill locomotion at 80 m/min, and navigation of an obstacle course. During treadmill locomotion with pseudorandom GVS there was a 12% decrease in coherence between head pitch and vertical translation at the step frequency relative to the no GVS condition, which was not significantly different to the 15% decrease in coherence observed in astronauts following shuttle missions. This disruption in head stabilization likely resulted in a decrease in DVA equivalent to the reduction in acuity observed in astronauts 6 days after return from extended missions aboard the International Space Station (ISS). There were significant increases in time-to-completion of the obstacle course during both pseudorandom (21%) and head-coupled (14%) GVS, equivalent to an ISS astronaut 5 days post-landing. An attempt to suppress head movement was evident during both pseudorandom and head-coupled GVS while negotiating the obstacle course, with a 20 and 16%, decrease in head pitch and yaw velocity, respectively. The results of this study demonstrate that pseudorandom GVS generates many of the salient features of post-flight locomotor dysfunction observed in astronauts following short and long duration missions. An ambulatory GVS system may prove a useful adjunct to the current pre-flight astronaut training regimen.
Similar content being viewed by others
Notes
Head movement was not measured during the FMT.
References
Anderson DJ, Reschke MF, Homick JE, Werness SAS (1986) Dynamic posture analysis of Spacelab-1 crew members. Exp Brain Res 64:380–391
Bach M (1996) The Freiburg Visual Acuity test-automatic measurement of visual acuity. Optom Vis Sci 73:49–53
Balter SG, Castelijns MH, Stokroos RJ, Kingma H (2004) Galvanic-induced body sway in vestibular schwannoma patients: evidence for stimulation of the central vestibular system. Acta Otolaryngol 124:1015–1021
Benson AJ, Vieville T (1986) European vestibular experiments on the Spacelab-1 mission: 6. Yaw axis vestibulo-ocular reflex. Exp Brain Res 64:279–283
Berthoz A, Brandt T, Dichgans J, Probst T, Bruzek W, Vieville T (1986) European vestibular experiments on the Spacelab-1 mission: 5. Contribution of the otoliths to the vertical vestibulo-ocular reflex. Exp Brain Res 64:272–278
Black FO (2001) What can posturography tell us about vestibular function? Ann NY Acad Sci 942:446–464
Black FO, Paloski WH, Doxey-Gasway DD, Reschke MF (1995) Vestibular plasticity following orbital spaceflight: recovery from postflight postural instabilty. Acta Otolaryngol Suppl 1995:450–454
Bles W, De Graaf B, Bos JE, Groen E, Krol JR (1997) A sustained hyper-g load as a tool to simulate space sickness. J Gravit Physiol 4:1–4
Bloomberg JJ, Mulavara AP (2003) Changes in walking strategies after spaceflight. IEEE Eng Med Biol Mag 22:58–62
Bloomberg JJ, Peters BT, Smith SL, Huebner WP, Reschke MF (1997) Locomotor head-trunk coordination strategies following space flight. J Vestib Res 7:161–177
Bloomberg JJ, Layne CS, McDonald PV, Peters BT, Huebner WP, Reschke MF, Berthoz A, Glasauer S, Newman D, Jackson DK (1999) Effects of space flight on locomotor control. In: Sawin CF, Taylor GR, Smith WL (eds) Extended Duration Orbiter Medical Project Final Report 1989–1995 (NASA/SP-1999-534). NASA Johnson Space Center, Houston
Bloomberg JJ, Mulavara AP, Cohen H, Richards JT, Miller C, Peters BT, Marshburn AM, Brady R (2004) Patterns of recovery in locomotor function following long-duration spaceflight. J Vestib Res 14:280 (Abstract)
Boyle R, Mensinger AF, Yoshida K, Usui S, Intravaia A, Tricas T, Highstein SM (2001) Neural readaptation to Earth’s gravity following return from space. J Neurophysiol 86:2118–2122
Carlsen AN, Kennedy PM, Anderson KG, Cressman EK, Nagelkerke P, Chua R (2005) Identifying visual-vestibular contributions during target-directed locomotion. Neurosci Lett 384:217–221
Clarke AH, Grigull J, Mueller R, Scherer H (2000) The three-dimensional vestibulo-ocular reflex during prolonged microgravity. Exp Brain Res 134:322–334
Clement G (1998) Alteration of eye movements and motion perception in microgravity. Brain Res Brain Res Rev 28:161–172
Coats AC (1972) The sinusoidal galvanic body-sway response. Acta Otolaryngol 74:155–162
Cohen HS (2000) Vestibular disorders and impaired path integration along a linear trajectory. J Vestib Res 10:7–15
Cohen B, Kozlovskaya IB, Raphan T, Solomon D, Helwig D, Cohen N, Sirota M, Yakushin SB (1992) Vestibulo-ocular reflex of rhesus monkeys after space flight. J Appl Physiol 73(2 Suppl ):121S–131S
Dai M, McGarvie L, Kozlovskaya IB, Raphan T, Cohen B (1994) Effects of spaceflight on ocular counterrolling and the spatial orientation of the vestibular system. Exp Brain Res 102:45–56
Deshpande N, Patla AE (2005) Dynamic visual-vestibular integration during goal directed human locomotion. Exp Brain Res 166(2):237–247
Goldberg JM, Smith CE, Fernandez C (1984) Relation between discharge regularity and responses to externally applied galvanic currents in vestibular nerve afferents of the squirrel monkey. J Neurophysiol 51:1236–1256
Groen E, De Graaf B, Bles W, Bos JE (1996) Ocular torsion before and after 1 hour centrifugation. Brain Res Bull 40:331–335
Harm DL, Reschke MF, Parker DE (1999) Visual vestibular integration: motion perception reporting. In: Sawin CF, Taylor GR, Smith WL (eds) Extended Duration Orbiter Medical Project Final Report 1989–1995 (NASA/SP-1999-534). NASA Johnson Space Center, Houston, pp 5.2-1–5.2-12
Hirasaki E, Moore ST, Raphan T, Cohen B (1999) Effects of walking velocity on vertical head and body movements during locomotion. Exp Brain Res 127:117–130
Hlavacka F, Njiokiktjien C (1985) Postural responses evoked by sinusoidal galvanic stimulation of the labyrinth. Influence of head position. Acta Otolaryngol 99:107–112
Homick JJ, Reschke MF (1977) Postural equilibrium following extended exposure to weightless space flight. Acta Otolaryngol 83:445–464
Imai T, Moore ST, Raphan T, Cohen B (2001) Interaction of the body, head, and eyes during walking and turning. Exp Brain Res 136:1–18
Kennedy PM, Carlsen AN, Inglis JT, Chow R, Franks IM, Chua R (2003) Relative contributions of visual and vestibular information on the trajectory of human gait. Exp Brain Res 153:113–117
Kenyon RV, Young LR (1986) M.I.T./Canadian vestibular experiments on the Spacelab-1 mission:5. Postural responses following exposure to weightlessness. Exp Brain Res 64:335–346
Keshner EA, Peterson BW (1995) Mechanisms controlling human head stabilization I: Head-neck dynamics during random rotations in the horizontal plane. J Neurophysiol 73:2293–2301
Keshner EA, Cromwell RL, Peterson BW (1995) Mechanisms controlling human head stabilization II: head-neck characteristics during random rotations in the vertical plane. J Neurophysiol 73:2302–2312
Kim J, Curthoys IS (2004) Responses of primary vestibular afferents to galvanic vestibular stimulation (GVS) in the anaesthetised guinea pig. Brain Res Bull (In press)
Kleine JF, Grusser OJ (1996) Responses of rat primary afferent vestibular neurons to galvanic polarization of the labyrinth. Ann N Y Acad Sci 781:639–641
Krizkova M, Hlavacka F (1994) Binaural monopolar galvanic vestibular stimulation reduces body sway during human stance. Physiol Res 43:187–192
Latt LD, Sparto PJ, Furman JM, Redfern MS (2003) The steady-state postural response to continuous sinusoidal galvanic vestibular stimulation. Gait Posture 18:64–72
Lieberman HR, Pentland AP (1982) Microcomputer-based estimation of psychophysical thresholds: The Best PEST. Behav Res Meth Instr 14:21–25
Macdougall HG, Moore ST (2005) Marching to the beat of the same drummer: the spontaneous tempo of human locomotion. J Appl Physiol 99:1164–1173
MacDougall HG, Brizuela AE, Curthoys IS (2003) Linearity, symmetry and additivity of the human eye-movement response to maintained unilateral and bilateral surface galvanic (DC) vestibular stimulation. Exp Brain Res 148:166–175
MacDougall H, Moore ST, Curthoys IS, Black FO (2006) Modeling postural instability with Galvanic vestibular stimulation. Exp Brain Res (in press)
Moore ST, Hirasaki E, Cohen B, Raphan T (1999) Effect of viewing distance on the generation of vertical eye movements during locomotion. Exp Brain Res 129:347–361
Moore ST, Clement G, Raphan T, Cohen B (2001a) Ocular counterrolling induced by centrifugation during orbital space flight. Exp Brain Res 137:323–335
Moore ST, Hirasaki E, Raphan T, Cohen B (2001b) The human vestibulo-ocular reflex during linear locomotion. In: Goebel J, Highstein SM (eds) The vestibular labyrinth in health and disease. New York Academy of Sciences, New York, pp 139–147
Moore ST, Clement G, Dai M, Raphan T, Solomon D, Cohen B (2003) Ocular and perceptual responses to linear acceleration in microgravity: alterations in otolith function on the COSMOS and Neurolab flights. J Vestib Res 13:377–393
Moore ST, Cohen B, Raphan T, Berthoz A, Clement G (2005) Spatial orientation of optokinetic nystagmus and ocular pursuit during orbital space flight. Exp Brain Res 160:38–59
NASA (2005) Bioastronautics Roadmap. NASA/SP-2004-6113
Nashner LM (1993) Computerized Dynamic Posturography. In: Jacobson GP, Newman CW, Kartush JM (eds) Handbook of Balance Function Testing. Mosby Year Book, St Louis, pp 298–301
Nooij SAE, Bos JE, Ockels WJ (2004) Investigation of vestibular adaptation to changing gravity levels on Earth. J Vest Res 14:133 (Abstract)
Ockels WJ, Furrer R, Messerschmid E (1990) Simulation of space adaptation syndrome on earth. Exp Brain Res 79:661–663
Oman CM, Pouliot CF, Natapoff A (1996) Horizontal angular VOR changes in orbital and parabolic flight: human neurovestibular studies on SLS-2. J Appl Physiol 81:69–81
Paloski WH, Reschke MF, Black FO, Doxey DD, Harm DL (1992) Recovery of postural equilibrium control following spaceflight. In: Cohen B, Tomko D, Guedry F (eds) Sensing and controlling motion: vestibular and sensorimotor function, vol 656. New York Academy of Sciences, New York, pp 747–754
Paloski WH, Black FO, Reschke MF, Calkins DS, Shupert C (1993) Vestibular ataxia following shuttle flights: effects of microgravity on otolith-mediated sensorimotor control of posture. Am J Otol 14:9–17
Paloski WH, Reschke MF, Black FO (1999) Recovery of Postural Equilibrium Control Following Space Flight (DSO 605). In: Sawin CF, Taylor GR, Smith WL (eds) Extended Duration Orbiter Medical Project Final Report 1989–1995 (NASA/SP-1999-534). NASA, Houston, pp 5.4:1–16
Paloski WH, Black FO, Metter EJ (2004) Postflight balance control recovery in an elderly astronaut: a case report. Otol Neurotol 25:53–56
Pavlik AE, Inglis JT, Lauk M, Oddsson L, Collins JJ (1999) The effects of stochastic galvanic vestibular stimulation on human postural sway. Exp Brain Res 124:273–280
Peng GC, Hain TC, Peterson BW (1996) A dynamical model for reflex activated head movements in the horizontal plane. Biol Cybern 75:309–319
Peng GC, Hain TC, Peterson BW (1999) Predicting vestibular, proprioceptive and biomechanical control strategies in normal and pathological head movements. IEEE Trans Biomed Eng 46:1269–1280
Peters BT, Bloomberg JJ (2005) Dynamic visual acuity using “far” and “near” targets. Acta Otolaryngol 125:353–357
Petersen H, Magnusson M, Fransson PA, Johansson R (1994) Vestibular disturbance at frequencies above 1 Hz affects human postural control. Acta Otolaryngol 114:225–230
Pozzo T, Berthoz A, Lefort L (1990) Head stabilization during various locomotor tasks in humans. I. Normal subjects. Exp Brain Res 82:97–106
Pozzo T, Berthoz A, Lefort L, Vitte E (1991) Head stabilization during various locomotor tasks in humans II: patients with bilateral peripheral vestibular deficits. Exp Brain Res 85:208–217
Reschke MF, Anderson DJ, Homick JL (1986) Vestibulo-spinal response modification as determined with the H-reflex during the Spacelab-1 flight. Exp Brain Res 64:367–379
Scinicariello AP, Inglis JT, Collins JJ (2002) The effects of stochastic monopolar galvanic vestibular stimulation on human postural sway. J Vestib Res 12:77–85
Shumway-Cook A, Horak FB (1986) Assessing the influence of sensory interaction of balance. Suggestion from the field. Phys Ther 66:1548–1550
Watson SR, Brizuela AE, Curthoys IS, Colebatch JG, MacDougall HG, Halmagyi GM (1998) Maintained ocular torsion produced by bilateral and unilateral galvanic (DC) vestibular stimulation in humans. Exp Brain Res 122:453–458
Watt DGD, Money KE, Tomi LM (1986) M.I.T./Canadian vestibular experiments on the Spacelab-1 mission: 3. Effects of prolonged weightlessness on a human otolith-spinal reflex. Exp Brain Res 64:308–315
Acknowledgments
This work was supported by NASA grant NNJ04HF51G and a National Space Biomedical Research Institute (NSBRI) Tactical Integration and Planning grant through NASA NCC 9-58 (Steven Moore).
Author information
Authors and Affiliations
Corresponding author
Electronic supplementary material
Supplementary material 1
Supplementary material 2
Rights and permissions
About this article
Cite this article
Moore, S.T., MacDougall, H.G., Peters, B.T. et al. Modeling locomotor dysfunction following spaceflight with Galvanic vestibular stimulation. Exp Brain Res 174, 647–659 (2006). https://doi.org/10.1007/s00221-006-0528-1
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00221-006-0528-1