Testing the assumption of normality in body sway area calculations during unipedal stance tests with an inertial sensor

Kyoung Jae Kim; Jennifer Lucarevic; Christopher Bennett; Ignacio Gaunaurd; Robert Gailey; Vibhor R Agrawal

doi:10.1109/EMBC.2016.7591847

Testing the assumption of normality in body sway area calculations during unipedal stance tests with an inertial sensor

Kyoung Jae Kim, Jennifer Lucarevic, Christopher Bennett, Ignacio Gaunaurd, Robert Gailey, Vibhor R Agrawal

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

4 Scopus citations

Abstract

The quantification of postural sway during the unipedal stance test is one of the essentials of posturography. A shift of center of pressure (CoP) is an indirect measure of postural sway and also a measure of a person's ability to maintain balance. A widely used method in laboratory settings to calculate the sway of body center of mass (CoM) is through an ellipse that encloses 95% of CoP trajectory. The 95% ellipse can be computed under the assumption that the spatial distribution of the CoP points recorded from force platforms is normal. However, to date, this assumption of normality has not been demonstrated for sway measurements recorded from a sacral inertial measurement unit (IMU). This work provides evidence for non-normality of sway trajectories calculated at a sacral IMU with injured subjects as well as healthy subjects.

Original language	English (US)
Title of host publication	2016 38th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2016
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	4987-4990
Number of pages	4
Volume	2016-October
ISBN (Electronic)	9781457702204
DOIs	https://doi.org/10.1109/EMBC.2016.7591847
State	Published - Oct 13 2016
Event	38th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2016 - Orlando, United States Duration: Aug 16 2016 → Aug 20 2016

Other

Other	38th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2016
Country/Territory	United States
City	Orlando
Period	8/16/16 → 8/20/16

ASJC Scopus subject areas

Signal Processing
Biomedical Engineering
Computer Vision and Pattern Recognition
Health Informatics

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10.1109/EMBC.2016.7591847

Cite this

Kim, K. J., Lucarevic, J., Bennett, C., Gaunaurd, I., Gailey, R., & Agrawal, V. R. (2016). Testing the assumption of normality in body sway area calculations during unipedal stance tests with an inertial sensor. In 2016 38th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2016 (Vol. 2016-October, pp. 4987-4990). [7591847] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/EMBC.2016.7591847

Testing the assumption of normality in body sway area calculations during unipedal stance tests with an inertial sensor. / Kim, Kyoung Jae; Lucarevic, Jennifer; Bennett, Christopher; Gaunaurd, Ignacio; Gailey, Robert ; Agrawal, Vibhor R.

2016 38th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2016. Vol. 2016-October Institute of Electrical and Electronics Engineers Inc., 2016. p. 4987-4990 7591847.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Kim, KJ, Lucarevic, J, Bennett, C, Gaunaurd, I, Gailey, R & Agrawal, VR 2016, Testing the assumption of normality in body sway area calculations during unipedal stance tests with an inertial sensor. in 2016 38th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2016. vol. 2016-October, 7591847, Institute of Electrical and Electronics Engineers Inc., pp. 4987-4990, 38th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2016, Orlando, United States, 8/16/16. https://doi.org/10.1109/EMBC.2016.7591847

Kim KJ, Lucarevic J, Bennett C, Gaunaurd I, Gailey R , Agrawal VR. Testing the assumption of normality in body sway area calculations during unipedal stance tests with an inertial sensor. In 2016 38th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2016. Vol. 2016-October. Institute of Electrical and Electronics Engineers Inc. 2016. p. 4987-4990. 7591847 https://doi.org/10.1109/EMBC.2016.7591847

Kim, Kyoung Jae ; Lucarevic, Jennifer ; Bennett, Christopher ; Gaunaurd, Ignacio ; Gailey, Robert ; Agrawal, Vibhor R. / Testing the assumption of normality in body sway area calculations during unipedal stance tests with an inertial sensor. 2016 38th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2016. Vol. 2016-October Institute of Electrical and Electronics Engineers Inc., 2016. pp. 4987-4990

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abstract = "The quantification of postural sway during the unipedal stance test is one of the essentials of posturography. A shift of center of pressure (CoP) is an indirect measure of postural sway and also a measure of a person's ability to maintain balance. A widely used method in laboratory settings to calculate the sway of body center of mass (CoM) is through an ellipse that encloses 95% of CoP trajectory. The 95% ellipse can be computed under the assumption that the spatial distribution of the CoP points recorded from force platforms is normal. However, to date, this assumption of normality has not been demonstrated for sway measurements recorded from a sacral inertial measurement unit (IMU). This work provides evidence for non-normality of sway trajectories calculated at a sacral IMU with injured subjects as well as healthy subjects.",

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Testing the assumption of normality in body sway area calculations during unipedal stance tests with an inertial sensor

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