Stair-specific algorithms for identification of touch-down and foot-off when descending or ascending a non-instrumented staircase

Foster, Richard J.; Asha, Alan R. De; Reeves, Neil D.; Maganaris, Constantinos N.; Buckley, John

doi:10.1016/j.gaitpost.2013.11.005

Cited by 17 publications

(20 citation statements)

References 16 publications

(32 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Previous reports based on aspects of this data are currently available in the literature [1,22,2,8,9]. This is the first study on the differences in CoM control and contribution of specific lower limb joints between young and older adults when descending stairs with increased versus standard stair riser-heights, using a step-over-step strategy, and focusing on two distinct phases of stance (landing and lowering).…”

Section: Methodsmentioning

confidence: 90%

Centre of mass control is reduced in older people when descending stairs at an increased riser height

et al. 2019

Self Cite

View full text Add to dashboard Cite

show abstract

Section: Methodsmentioning

confidence: 90%

Centre of mass control is reduced in older people when descending stairs at an increased riser height

et al. 2019

Self Cite

View full text Add to dashboard Cite

show abstract

“…2). We cannot distinguish if the speed increase was mainly in the stance or swing phase of stairs negotiation as we did not record the foot-off events [30]. One can assume that patients lowered their body faster during the stance phase because the subjects increased their joint angular speed at the knee in the sagittal plane and at the hip in the frontal plane when descending stairs [44].…”

Section: Discussionmentioning

confidence: 97%

“…A cycle lasts from the time point a foot touches the ground until the next contact of the same foot. A combination of vertical shank acceleration and hip and knee angular movement were used to detect those events [29,30].…”

Section: Objective Functional Assessment Of Locomotionmentioning

confidence: 99%

Lower limb kinematics improvement after genicular nerve blockade in patients with knee osteoarthritis: a milestone study using inertial sensors

Lebleu

Fonkoué

Bandolo

et al. 2020

BMC Musculoskelet Disord

View full text Add to dashboard Cite

Background Genicular nerve blockade is a possible treatment for patients with knee osteoarthritis. Pain relief and improvement in functioning is expected. This procedure could be of major interest for patients in low-income countries where total knee arthroplasty is not available for the population. This study aims at assessing the immediate benefits on pain, gait, and stairs kinematics after a genicular nerve blockade in patients suffering from knee osteoarthritis in Cameroun. Methods A prospective study was carried out on 26 subjects in Cameroun. A genicular nerve blockade was performed on 14 women with painful knee osteoarthritis grade 2–4. Lower limb joint angles were recorded with inertial sensors before and 1 h after injection. Patient-reported outcomes of pain and perceived difficulty were collected, as well as 10 m and 6 min walking tests. A reliability analysis of inertial sensors was performed on a sample of 12 healthy subjects by calculating the intraclass correlation coefficient and the standard error of measurement. Results Pain and perceived difficulty decreased significantly (p < 0.001). Cadence increased significantly in stairs climbing (upstairs: + 7.7 steps/min; downstairs: + 7.6 steps/min). There was an improvement for hip sagittal range of motion during gait (+ 9.3°) and pelvis transverse range of motion in walking upstairs (− 3.3°). Angular speed range of the knee in the sagittal plane and of the hip in the frontal plane increased significantly in stairs descent (+ 53.7°/s, + 94.5°/s). Conclusions This study quantified improvement of gait and stair climbing immediately after a genicular nerve blockade in patients suffering from knee OA in Cameroon. This is the first study objectifying this effect, through wearable sensors. Trial registration Pan African Clinical Trial Registry, PACTR202004822698484. Registered 28 March 2020 - Retrospectively registered.

show abstract

“…Existing stair ascent and descent marker-based event detection algorithms were used to determine instants of foot-contact and foot-off in each trial. 18 Trials were completed using a 'step-over-step gait', thus the 'leading limb' on each staircase step alternated between left and right limbs. As transitions from stair to floor have been shown to involve slightly different limb kinematics, 16 heel clearance for the bottom step in descent was not assessed.…”

Section: Discussionmentioning

confidence: 99%

“…Marker trajectories were labelled in Vicon Nexus (http://www.vicon.com/software/nexus) and the resultant C3D files uploaded to Visual 3D (http://www.c-motion.com/products/visual3d/) for further analysis. Existing stair ascent and descent marker‐based event detection algorithms were used to determine instants of foot‐contact and foot‐off in each trial . Trials were completed using a ‘step‐over‐step gait’, thus the ‘leading limb’ on each staircase step alternated between left and right limbs.…”

Section: Methodsmentioning

confidence: 99%

Intermediate addition multifocals provide safe stair ambulation with adequate ‘short‐term’ reading

Elliott

Hotchkiss

Scally

et al. 2015

Ophthalmic Physiologic Optic

Self Cite

View full text Add to dashboard Cite

PurposeA recent randomised controlled trial indicated that providing long‐term multifocal wearers with a pair of distance single‐vision spectacles for use outside the home reduced falls risk in active older people. However, it also found that participants disliked continually switching between using two pairs of glasses and adherence to the intervention was poor. In this study we determined whether intermediate addition multifocals (which could be worn most of the time inside and outside the home and thus avoid continual switching) could provide similar gait safety on stairs to distance single vision spectacles whilst also providing adequate ‘short‐term’ reading and near vision.MethodsFourteen healthy long‐term multifocal wearers completed stair ascent and descent trials over a 3‐step staircase wearing intermediate and full addition bifocals and progression‐addition lenses (PALs) and single‐vision distance spectacles. Gait safety/caution was assessed using foot clearance measurements (toe on ascent, heel on descent) over the step edges and ascent and descent duration. Binocular near visual acuity, critical print size and reading speed were measured using Bailey‐Lovie near charts and MNRead charts at 40 cm.ResultsGait safety/caution measures were worse with full addition bifocals and PALs compared to intermediate bifocals and PALs. The intermediate PALs provided similar gait ascent/descent measures to those with distance single‐vision spectacles. The intermediate addition PALs also provided good reading ability: Near word acuity and MNRead critical print size were better with the intermediate addition PALs than with the single‐vision lenses (p < 0.0001), with a mean near visual acuity of 0.24 ± 0.13 logMAR (~N5.5) which is satisfactory for most near vision tasks when performed for a short period of time.ConclusionsThe better ability to ‘spot read’ with the intermediate addition PALs compared to single‐vision spectacles suggests that elderly individuals might better comply with the use of intermediate addition PALs outside the home. A lack of difference in gait parameters for the intermediate addition PALs compared to distance single‐vision spectacles suggests they could be usefully used to help prevent falls in older well‐adapted full addition PAL wearers. A randomised controlled trial to investigate the usefulness of intermediate multifocals in preventing falls seems warranted.

show abstract

Stair-specific algorithms for identification of touch-down and foot-off when descending or ascending a non-instrumented staircase

Cited by 17 publications

References 16 publications

Centre of mass control is reduced in older people when descending stairs at an increased riser height

Centre of mass control is reduced in older people when descending stairs at an increased riser height

Lower limb kinematics improvement after genicular nerve blockade in patients with knee osteoarthritis: a milestone study using inertial sensors

Intermediate addition multifocals provide safe stair ambulation with adequate ‘short‐term’ reading

Contact Info

Product

Resources

About