Inter-segment foot motion and ground reaction forces over the stance phase of walking

Hunt, Adrienne; Smith, Richard M.; Torode, Marg; Keenan, Anne‐Maree

doi:10.1016/s0268-0033(01)00040-7

Cited by 167 publications

(142 citation statements)

References 23 publications

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“…In agreement with reports based on surface markers [20,23,25,31,[39][40][41] as well as bone pins [42], our results showed that the calcaneus undergoes rapid pronation in early stance. In order to examine the contribution of each moving segment to relative motion between the two segments, joint kinematics were expressed in two different ways.…”

Section: Discussionsupporting

confidence: 93%

“…At terminal stance, in agreement with previous reports [18,25,30,31,51], calcaneal supination was accompanied by first metatarsal and forefoot supination to convert the foot into a rigid lever. In subjects with DM, decreases in calcaneal plantarflexion (Figure 1-g and 2-g), first metatarsal and forefoot supination were noted (Figures 1 and 2; e and h).…”

Section: Discussionsupporting

confidence: 92%

“…Gradual arch deformation, discerned as sagittal plane motion of the first metatarsal relative to the calcaneus (Figure 1-a) followed calcaneal pronation in both groups, in agreement with previous reports [20,25,30,31]. In terminal stance, calcaneal plantarflexion, under the influence of the gastrocnemius-soleus complex, resulted in rapid tensing of the arch, providing midfoot stability.…”

Section: Discussionsupporting

confidence: 90%

“…The foot was segmented into the first metatarsal, calcaneus and forefoot, where first metatarsal and calcaneus segments referred to the underlying bony anatomy while the forefoot segment comprised metatarsals 2 through 5. This definition of the forefoot segment, consistent with previous kinematic models [30,31] was used to facilitate comparison of results across studies. Motion of the calcaneus relative to the tibia encompasses the talocalcaneal (subtalar) as well as the talocrural (ankle) joints.…”

Section: Multisegment Kinematic Model Of the Footmentioning

confidence: 99%

“…Processed kinematic data were time normalized to 100 percent stance. Stance phase mean was subtracted from pattern to correct for systematic offsets [31]. The application of this correction eliminates systematic offsets between groups and helps reduce between-subject variability, allowing for comparisons of range, timing and pattern of motion between the study and control groups.…”

Section: Multisegment Kinematic Model Of the Footmentioning

confidence: 99%

See 4 more Smart Citations

Segmental foot mobility in individuals with and without diabetes and neuropathy

Rao

Saltzman

Yack

2007

Clinical Biomechanics

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show abstract

Section: Discussionsupporting

confidence: 93%

Section: Discussionsupporting

confidence: 92%

Section: Discussionsupporting

confidence: 90%

Section: Multisegment Kinematic Model Of the Footmentioning

confidence: 99%

Section: Multisegment Kinematic Model Of the Footmentioning

confidence: 99%

See 3 more Smart Citations

Segmental foot mobility in individuals with and without diabetes and neuropathy

Rao

Saltzman

Yack

2007

Clinical Biomechanics

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Evaluation of knee joint muscle forces and tissue stresses‐strains during gait in severe OA versus normal subjects

Adouni

Shirazi‐Adl

2013

Journal Orthopaedic Research

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Osteoarthritis (OA) is the leading cause of pain and disability in the elderly with the knee being the most affected weight bearing joint. We used a musculoskeletal biomechanical model of the lower extremity including a detailed validated knee joint finite element model to compute lower extremity muscle forces and knee joint stresses-strains during the stance phase of gait. The model was driven by gait data on OA patients, and results were compared with those of the same model driven by data on normal controls. Additional analyses were performed with altered cartilage-menisci properties to evaluate the effects of deterioration during OA. In OA patients compared to normal subjects, muscle forces dropped at nearly all stance periods except mid-stance. Force in the anterior cruciate ligament remained overall the same. Total contact forces-stresses deceased by about 25%. Alterations in properties due to OA had negligible effects on muscle forces, but increased contact areas and cartilage strains and reduced contact pressures. Reductions in contact stresses and increases in tissue strains and transfer of load via menisci are partly due to the altered kinetics-kinematics of gait and partly due to deterioration in cartilage-menisci properties in OA patients. ß

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Reconfigurable ankle rehabilitation robot for various exercises

2006

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This paper presents a reconfigurable ankle rehabilitation robot to cover various rehabilitation exercise modes. The designed robot can allow desired ankle and foot motions, including toe and heel raising as well as traditional ankle rotations, since the mechanism can generate relative rotation between the fore and rear platforms as well as pitch and roll motions. In addition, the robotic device can be reconfigured from a range of motion ͑ROM͒/strengthening exercise device to a balance/proprioception exercise device by simply incorporating an additional plate. Further, the action of the device is twofold in the sense that while a patient's foot is fastened firmly to the ROM/strengthening device for task specific training, that person can also stand on the balance/proproception device. To perform each mode of ROM, strengthening, and proproception exercises, a unified position-based impedance control is systematically developed taking into account the desired position and velocity.

show abstract

Inter-segment foot motion and ground reaction forces over the stance phase of walking

Cited by 167 publications

References 23 publications

Segmental foot mobility in individuals with and without diabetes and neuropathy

Segmental foot mobility in individuals with and without diabetes and neuropathy

Evaluation of knee joint muscle forces and tissue stresses‐strains during gait in severe OA versus normal subjects

Reconfigurable ankle rehabilitation robot for various exercises

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