Effects of water immersion on gait initiation: part II of a case series after incomplete spinal cord injury

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Abstract

Study design

Case series.

Objectives

This case series describes how the aquatic environment influences gait initiation in terms of the center of pressure (COP) excursion, impulses, trunk acceleration, and perceptions of participants with incomplete spinal cord injury (iSCI).

Setting

Tertiary Rehabilitation Hospital, Ontario, Canada.

Methods

Five individuals with iSCI (four cervical injuries/one thoracic injury, AIS D) participated in the study. Baseline clinical balance was evaluated by Berg Balance Scale and Mini-Balance Evaluation System Test. Participants initiated gait on a waterproof force plate and walked ~4 steps, in water and on land. COP trajectories during anticipatory and execution phases, impulses, and trunk acceleration parameters were investigated. Perceptions of walking in both environments were obtained using an interview.

Results

COP trajectory was prominently longer when individuals stepped forward. A decrease in velocity of COP was observed predominantly in the AP direction during stepping. Non-normalized vertical impulses decreased as the AP impulses increased, in water compared to land. Upper to lower trunk acceleration ratios showed how water resistance influenced the lower trunk acceleration. Most of participants reported that walking in water was challenging, but safer than on land.

Conclusions

Participants with higher balance function seemed to have more pronounced changes in anticipatory and execution phases’ duration, length and velocity of COP. A faster anticipatory phase and a slower execution phase were observed in water than on land. Participants walked in water using a different trunk control strategy than on land and reported no fear of falling when walking in water versus land.

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Acknowledgements

Special thanks to the physiotherapist Mr. Chris Allapat for assessing the clinical balance and neurological functions of study participants. We thank Dr. Kamiar Aminian for providing the inertial sensor system. We also acknowledge the research and technical support of Adolazim Rashidi and Carlos Buzelli Neto during the experiments, and the assistance of the summer students from the SCI Mobility Laboratory at Toronto Rehabilitation Institute–University Health Network.

Funding

Dr. Marinho-Buzelli acknowledges the support of Canadian Institutes of Health and Research (CIHR) through the Vanier Canada Graduate Scholarship on the development of this study [Grant # 95662]. Dr. Rouhani acknowledges the support of the Swiss National Science Foundation Grants [PBELP3-137539 and P300P2-147865] and Spinal Cord Injury Ontario Postdoctoral Fellowship. Dr. Craven acknowledges support from the Toronto Rehab Foundation as the Toronto Rehab Chair in SCI Rehabilitation. This research was also supported by the Natural Sciences and Engineering Research Council grant [#249669], Ontario Neurotrauma Foundation, Réseau Provincial de Recherche en Adaptation-Réadaptation (REPAR) and KITE, Toronto Rehab—University Health Network.

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Correspondence to Andresa R. Marinho-Buzelli.

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Marinho-Buzelli, A.R., Barela, A.M.F., Craven, B.C. et al. Effects of water immersion on gait initiation: part II of a case series after incomplete spinal cord injury. Spinal Cord Ser Cases 5, 84 (2019) doi:10.1038/s41394-019-0231-7

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