Quantized dynamical entropy (QDE) has recently been proposed as a new measure to quantify the complexity of dynamical systems with the purpose of offering a better computational efficiency. This paper further investigates the viability of this method using five different human gait signals. These signals are recorded while normal walking and while performing secondary tasks among two age groups (young and older age groups). The results are compared with the outcomes of previously established sample entropy (SampEn) measure for the same signals. We also study how analyzing segmented and spatially and temporally normalized signal differs from analyzing whole data. Our findings show that human gait signals become more complex as people age and while they are cognitively loaded. Center of pressure (COP) displacement in mediolateral direction is the best signal for showing the gait changes. Moreover, the results suggest that by segmenting data, more information about intrastride dynamical features are obtained. Most importantly, QDE is shown to be a reliable measure for human gait complexity analysis.
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January 2018
Research-Article
The Effects of Aging and Dual Tasking on Human Gait Complexity During Treadmill Walking: A Comparative Study Using Quantized Dynamical Entropy and Sample Entropy
Samira Ahmadi,
Samira Ahmadi
Department of Mechanical Engineering,
University of Manitoba,
Room E1-451 EITC,
15 Gillson Street,
Winnipeg, MB R3T 5V6, Canada
e-mail: ahmadis3@myumanitoba.ca
University of Manitoba,
Room E1-451 EITC,
15 Gillson Street,
Winnipeg, MB R3T 5V6, Canada
e-mail: ahmadis3@myumanitoba.ca
Search for other works by this author on:
Christine Wu,
Christine Wu
Fellow ASME
Department of Mechanical Engineering,
University of Manitoba,
Room E2-327 Engineering Information
and Technology Complex,
75A Chancellors Circle,
Winnipeg, MB R3T 5V6, Canada
e-mail: christine.wu@umanitoba.ca
Department of Mechanical Engineering,
University of Manitoba,
Room E2-327 Engineering Information
and Technology Complex,
75A Chancellors Circle,
Winnipeg, MB R3T 5V6, Canada
e-mail: christine.wu@umanitoba.ca
Search for other works by this author on:
Nariman Sepehri,
Nariman Sepehri
Fellow ASME
Department of Mechanical Engineering,
University of Manitoba,
Room E2-327 Engineering Information
and Technology Complex,
75A Chancellors Circle,
Winnipeg, MB R3T 5V6, Canada
e-mail: nariman.sepehri@umanitoba.ca
Department of Mechanical Engineering,
University of Manitoba,
Room E2-327 Engineering Information
and Technology Complex,
75A Chancellors Circle,
Winnipeg, MB R3T 5V6, Canada
e-mail: nariman.sepehri@umanitoba.ca
Search for other works by this author on:
Anuprita Kantikar,
Anuprita Kantikar
College of Rehabilitation Sciences,
University of Manitoba,
R106-771 McDermot Avenue,
Winnipeg, MB R3E 0T6, Canada
e-mail: anuprita.kan@gmail.com
University of Manitoba,
R106-771 McDermot Avenue,
Winnipeg, MB R3E 0T6, Canada
e-mail: anuprita.kan@gmail.com
Search for other works by this author on:
Mayur Nankar,
Mayur Nankar
College of Rehabilitation Sciences,
University of Manitoba,
R106-771 McDermot Avenue,
Winnipeg, MB R3E 0T6, Canada
e-mail: mayur5522@gmail.com
University of Manitoba,
R106-771 McDermot Avenue,
Winnipeg, MB R3E 0T6, Canada
e-mail: mayur5522@gmail.com
Search for other works by this author on:
Tony Szturm
Tony Szturm
Department of Physical Therapy,
College of Rehabilitation Sciences,
University of Manitoba,
R106-771 McDermot Avenue,
Winnipeg, MB R3E 0T6, Canada
e-mail: tony.szturm@umanitoba.ca
College of Rehabilitation Sciences,
University of Manitoba,
R106-771 McDermot Avenue,
Winnipeg, MB R3E 0T6, Canada
e-mail: tony.szturm@umanitoba.ca
Search for other works by this author on:
Samira Ahmadi
Department of Mechanical Engineering,
University of Manitoba,
Room E1-451 EITC,
15 Gillson Street,
Winnipeg, MB R3T 5V6, Canada
e-mail: ahmadis3@myumanitoba.ca
University of Manitoba,
Room E1-451 EITC,
15 Gillson Street,
Winnipeg, MB R3T 5V6, Canada
e-mail: ahmadis3@myumanitoba.ca
Christine Wu
Fellow ASME
Department of Mechanical Engineering,
University of Manitoba,
Room E2-327 Engineering Information
and Technology Complex,
75A Chancellors Circle,
Winnipeg, MB R3T 5V6, Canada
e-mail: christine.wu@umanitoba.ca
Department of Mechanical Engineering,
University of Manitoba,
Room E2-327 Engineering Information
and Technology Complex,
75A Chancellors Circle,
Winnipeg, MB R3T 5V6, Canada
e-mail: christine.wu@umanitoba.ca
Nariman Sepehri
Fellow ASME
Department of Mechanical Engineering,
University of Manitoba,
Room E2-327 Engineering Information
and Technology Complex,
75A Chancellors Circle,
Winnipeg, MB R3T 5V6, Canada
e-mail: nariman.sepehri@umanitoba.ca
Department of Mechanical Engineering,
University of Manitoba,
Room E2-327 Engineering Information
and Technology Complex,
75A Chancellors Circle,
Winnipeg, MB R3T 5V6, Canada
e-mail: nariman.sepehri@umanitoba.ca
Anuprita Kantikar
College of Rehabilitation Sciences,
University of Manitoba,
R106-771 McDermot Avenue,
Winnipeg, MB R3E 0T6, Canada
e-mail: anuprita.kan@gmail.com
University of Manitoba,
R106-771 McDermot Avenue,
Winnipeg, MB R3E 0T6, Canada
e-mail: anuprita.kan@gmail.com
Mayur Nankar
College of Rehabilitation Sciences,
University of Manitoba,
R106-771 McDermot Avenue,
Winnipeg, MB R3E 0T6, Canada
e-mail: mayur5522@gmail.com
University of Manitoba,
R106-771 McDermot Avenue,
Winnipeg, MB R3E 0T6, Canada
e-mail: mayur5522@gmail.com
Tony Szturm
Department of Physical Therapy,
College of Rehabilitation Sciences,
University of Manitoba,
R106-771 McDermot Avenue,
Winnipeg, MB R3E 0T6, Canada
e-mail: tony.szturm@umanitoba.ca
College of Rehabilitation Sciences,
University of Manitoba,
R106-771 McDermot Avenue,
Winnipeg, MB R3E 0T6, Canada
e-mail: tony.szturm@umanitoba.ca
1Corresponding author.
Manuscript received December 13, 2016; final manuscript received September 13, 2017; published online October 31, 2017. Assoc. Editor: Kenneth Fischer.
J Biomech Eng. Jan 2018, 140(1): 011006 (10 pages)
Published Online: October 31, 2017
Article history
Received:
December 13, 2016
Revised:
September 13, 2017
Citation
Ahmadi, S., Wu, C., Sepehri, N., Kantikar, A., Nankar, M., and Szturm, T. (October 31, 2017). "The Effects of Aging and Dual Tasking on Human Gait Complexity During Treadmill Walking: A Comparative Study Using Quantized Dynamical Entropy and Sample Entropy." ASME. J Biomech Eng. January 2018; 140(1): 011006. https://doi.org/10.1115/1.4037945
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