Automatic detection of lift-off and touch-down of a pick-up walker using 3D kinematics

Grootveld, L; Thies, SBA; Ogden, D; Howard, D; Kenney, LPJ

doi:10.1016/j.medengphy.2013.08.008

Characterisation of rollator use using inertial sensors (2016)
Journal Article
Cheng, T., Kenney, L., Amor, J., Thies, S., Costamagna, E., James, C., & Holloway, C. (2016). Characterisation of rollator use using inertial sensors. Healthcare Technology Letters, 3(4), https://doi.org/10.1049/htl.2016.0061

The use of walking aids is prevalent among older people and people with mobility impairment. Rollators are designed to support outdoor mobility and require the user to negotiate curbs and slopes in the urban environment. Despite the prevalence of rol... Read More about Characterisation of rollator use using inertial sensors.

Crowd-sourced amputee gait data : a feasibility study using YouTube videos of unilateral trans-femoral gait (2016)
Journal Article
Gardiner, J., Gunarathne, N., Howard, D., & Kenney, L. (2016). Crowd-sourced amputee gait data : a feasibility study using YouTube videos of unilateral trans-femoral gait. PLoS ONE, 11(10), e0165287. https://doi.org/10.1371/journal.pone.0165287

Collecting large datasets of amputee gait data is notoriously difficult. Additionally, collecting data on less prevalent amputations or on gait activities other than level walking and running on hard surfaces is rarely attempted. However, with the we... Read More about Crowd-sourced amputee gait data : a feasibility study using YouTube videos of unilateral trans-femoral gait.

A review of the design and clinical evaluation of the ShefStim array-based functional electrical stimulation system (2016)
Journal Article
Kenney, L., Heller, B., Barker, A., Reeves, M., Healey, J., Good, T., …Howard, D. (2016). A review of the design and clinical evaluation of the ShefStim array-based functional electrical stimulation system. Medical Engineering and Physics, 38(11), 1159 -1165. https://doi.org/10.1016/j.medengphy.2016.08.005

Functional electrical stimulation has been shown to be a safe and effective means of correcting foot drop of central neurological origin. Current surface-based devices typically consist of a single channel stim- ulator, a sensor for determining gait... Read More about A review of the design and clinical evaluation of the ShefStim array-based functional electrical stimulation system.

Dealing with time-varying recruitment and length in Hill-type muscle models (2016)
Journal Article
Hamouda, A., Kenney, L., & Howard, D. (2016). Dealing with time-varying recruitment and length in Hill-type muscle models. Journal of Biomechanics, 49(14), 3375-3380. https://doi.org/10.1016/j.jbiomech.2016.08.030

Hill-type muscle models are often used in muscle simulation studies and also in the design and virtual prototyping of functional electrical stimulation systems. These models have to behave in a sufficiently realistic manner when recruitment level a... Read More about Dealing with time-varying recruitment and length in Hill-type muscle models.

The reality of myoelectric prostheses : understanding what makes these devices difficult for some users to control (2016)
Journal Article
control. Frontiers in Neurorobotics, 10(7), https://doi.org/10.3389/fnbot.2016.00007

Users of myoelectric prostheses can often find them difficult to control. This can lead to passive-use of the device or total rejection, which can have detrimental effects on the contralateral limb due to overuse. Current clinically available prosth... Read More about The reality of myoelectric prostheses : understanding what makes these devices difficult for some users to control.

Functional electrical stimulation versus ankle foot orthoses for foot-drop : a meta-analysis of orthotic effects (2016)
Journal Article
Prenton, S., Hollands, K., & Kenney, L. (2016). Functional electrical stimulation versus ankle foot orthoses for foot-drop : a meta-analysis of orthotic effects. Journal of Rehabilitation Medicine, 48(8), 646-656. https://doi.org/10.2340/16501977-2136

Objective: To compare the effects on walking of functional electrical stimulation (FES) and ankle foot orthoses for footdrop of central neurological origin, assessed in terms of unassisted walking behaviours compared with assisted walking following... Read More about Functional electrical stimulation versus ankle foot orthoses for foot-drop : a meta-analysis of orthotic effects.

A novel method of using accelerometry for upper limb FES control (2016)
Journal Article
Sun, M., Kenney, L., Smith, C., Waring, K., Luckie, H., Liu, A., & Howard, D. (2016). A novel method of using accelerometry for upper limb FES control. Medical Engineering and Physics, 38(11), 1244-1250. https://doi.org/10.1016/j.medengphy.2016.06.005

This paper reports on a novel approach to using a 3-axis accelerometer to capture body segment angle for upper limb functional electrical stimulation (FES) control. The approach calculates the angle between the accelerome... Read More about A novel method of using accelerometry for upper limb FES control.

Transtibial amputee gait efficiency : energy storage and return versus solid ankle cushioned heel prosthetic feet (2016)
Journal Article
Gardiner, J., Bari, A., Howard, D., & Kenney, L. (2016). Transtibial amputee gait efficiency : energy storage and return versus solid ankle cushioned heel prosthetic feet. Journal of rehabilitation research and development, 53(6), 1133-1138. https://doi.org/10.1682/JRRD.2015.04.0066

Energy storage and return (ESR) feet have long been assumed to promote metabolically efficient amputee gait. However, despite being prescribed for approximately thirty years, there is limited evidence that they achieve this desired function. Here, we... Read More about Transtibial amputee gait efficiency : energy storage and return versus solid ankle cushioned heel prosthetic feet.

The effects of prosthetic ankle stiffness on stability of gait in people with trans-tibial amputation (2016)
Journal Article
Major, M., Twiste, M., Kenney, L., & Howard, D. (2016). The effects of prosthetic ankle stiffness on stability of gait in people with trans-tibial amputation. Journal of rehabilitation research and development, 53(6), 839-852. https://doi.org/10.1682/JRRD.2015.08.0148

The ability to control balance during walking is a critical precondition for minimizing fall risk, but is compromised in persons with lower-limb loss due to reduced sensory feedback mechanisms and inability to actively modulate prosthesis mechanical... Read More about The effects of prosthetic ankle stiffness on stability of gait in people with trans-tibial amputation.

Effects of shoe sole geometry on toe clearance and walking stability in older adults (2015)
Journal Article
Thies, S., Price, C., Kenney, L., & Baker, R. (2015). Effects of shoe sole geometry on toe clearance and walking stability in older adults. Gait & Posture, 42(2), 105-109. https://doi.org/10.1016/j.gaitpost.2015.04.011

Thirty-five percent of people above age 65 fall each year, and half of their falls are associated with tripping: tripping, an apparently ‘mundane’ everyday problem, therefore significantly impacts on older people's health and associated medical costs... Read More about Effects of shoe sole geometry on toe clearance and walking stability in older adults.

Older people’s experiences of using tactile paving (2015)
Journal Article
Ormerod, M., Newton, R., MacLennan, H., Faruk, M., Thies, S., Kenney, L., …Nester, C. (2015). Older people’s experiences of using tactile paving. Proceedings of the ICE - Municipal Engineer, 168(1), 3-10. https://doi.org/10.1680/muen.14.00016

Tactile paving has been designed in response to the needs of vision-impaired pedestrians to be independent, mobile, confident and safe when using the external environment. Tactile paving is not without its critics because it can adversely affect ot... Read More about Older people’s experiences of using tactile paving.

The development and validation of an activity monitoring system for use in measurement of posture of childbearing women during first stage of labour (2015)
Journal Article
Hollins-Martin, C., Kenney, L., Pratt, T., & Granat, M. (2015). The development and validation of an activity monitoring system for use in measurement of posture of childbearing women during first stage of labour. Journal of Midwifery and Women's Health, 60(2), 182-186. https://doi.org/10.1111/jmwh.12230

Introduction: There is limited understanding of the type and extent of maternal postures that midwives should encourage or support during labor. The aims of this study were to identify a set of postures and movements commonly seen during labor, to d... Read More about The development and validation of an activity monitoring system for use in measurement of posture of childbearing women during first stage of labour.

A sock for foot-drop : A preliminary study on two chronic stroke patients (2014)
Journal Article
Prenton, S., Kenney, L., Cooper, G., & Major, M. (2014). A sock for foot-drop : A preliminary study on two chronic stroke patients. Prosthetics and Orthotics International, 38(5), 425-430. https://doi.org/10.1177/0309364613505107

Foot-drop is a common motor impairment of chronic stroke patients, which may be addressed with an ankle foot orthosis. Although there is reasonable evidence of effectiveness for ankle foot orthoses, user compliance is sometimes poor. This study inves... Read More about A sock for foot-drop : A preliminary study on two chronic stroke patients.

The use of an adjustable electrode housing unit to compare electrode alignment and contact variation with myoelectric prosthesis functionality: A pilot study (2014)
Journal Article
and contact variation with myoelectric prosthesis functionality: A pilot study. Prosthetics and Orthotics International, 40(1), 123-128. https://doi.org/10.1177/0309364614545417

Background: Usable myoelectric control relies on secure and intimate contact at all times between the electrode, the socket and the residual limb. At present, there is little post-fitting socket adjustment available to prosthetists with respect to el... Read More about The use of an adjustable electrode housing unit to compare electrode alignment and contact variation with myoelectric prosthesis functionality: A pilot study.

Feasibility study of a take-home array-based functional electrical stimulation system with automated setup for current functional electrical stimulation users with foot-drop (2014)
Journal Article
Prenton, S., Kenney, L., Stapleton, C., Cooper, G., Reeves, M., Heller, B., …Williamson, T. (2014). Feasibility study of a take-home array-based functional electrical stimulation system with automated setup for current functional electrical stimulation users with foot-drop. Archives of Physical Medicine and Rehabilitation, 95(10), 1870-1877. https://doi.org/10.1016/j.apmr.2014.04.027

Objective To investigate the feasibility of unsupervised community use of an array-based automated setup functional electrical stimulator for current foot-drop functional electrical stimulation (FES) users. Design Feasibility study. S... Read More about Feasibility study of a take-home array-based functional electrical stimulation system with automated setup for current functional electrical stimulation users with foot-drop.

Visuomotor behaviours when using a myoelectric prosthesis (2014)
Journal Article
prosthesis. Journal of NeuroEngineering and Rehabilitation, 11(72), https://doi.org/10.1186/1743-0003-11-72

Background A recent study showed that the gaze patterns of amputee users of myoelectric prostheses differ markedly from those seen in anatomically intact subjects. Gaze behaviour is a promising outcome measures for prosthesis designers, as it appe... Read More about Visuomotor behaviours when using a myoelectric prosthesis.

Enhancing public involvement in assistive technology design research (2014)
Journal Article
Williamson, T., Kenney, L., Barker, A., Cooper, G., Good, T., Healey, J., …Smith, C. (2015). Enhancing public involvement in assistive technology design research. Disability and Rehabilitation: Assistive Technology, 10(3), 258-265. https://doi.org/10.3109/17483107.2014.908247

To appraise the application of accepted good practice guidance on public involvement in assistive technology research and to identify its impact on the research team, the public, device and trial design. Methods: Critical reflection and within-proje... Read More about Enhancing public involvement in assistive technology design research.

Automated detection of instantaneous gait events using time frequency analysis and manifold embedding (2013)
Journal Article
using time frequency analysis and manifold embedding. IEEE Transactions on Neural Systems and Rehabilitation Engineering, 21(6), 908-915. https://doi.org/10.1109/TNSRE.2013.2239313

Accelerometry is a widely used sensing modality in human biomechanics due to its portability, non-invasiveness, and accuracy. However, difficulties lie in signal variability and interpretation in relation to biomechanical events. In walking, heel st... Read More about Automated detection of instantaneous gait events using time frequency analysis and manifold embedding.

The effects of prosthetic ankle stiffness on ankle and knee kinematics, prosthetic limb loading, and net metabolic cost of trans-tibial amputee gait (2013)
Journal Article
Major, M., Twiste, M., Kenney, L., & Howard, D. (2014). The effects of prosthetic ankle stiffness on ankle and knee kinematics, prosthetic limb loading, and net metabolic cost of trans-tibial amputee gait. Clinical Biomechanics, 29(1), 98-104. https://doi.org/10.1016/j.clinbiomech.2013.10.012

Background Previous studies of commercially-available trans-tibial prosthetic components have been unable to provide clear insight into the relationships between prosthetic mechanical properties and user performance (i.e., gait quality and energy ex... Read More about The effects of prosthetic ankle stiffness on ankle and knee kinematics, prosthetic limb loading, and net metabolic cost of trans-tibial amputee gait.

Automatic detection of lift-off and touch-down of a pick-up walker using 3D kinematics (2013)
Journal Article
Grootveld, L., Thies, S., Ogden, D., Howard, D., & Kenney, L. (2014). Automatic detection of lift-off and touch-down of a pick-up walker using 3D kinematics. Medical Engineering and Physics, 36(2), 255-260. https://doi.org/10.1016/j.medengphy.2013.08.008

Walking aids have been associated with falls and it is believed that incorrect use limits their usefulness. Measures are therefore needed that characterize their stable use and the classification of key events in walking aid movement is the first ste... Read More about Automatic detection of lift-off and touch-down of a pick-up walker using 3D kinematics.

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