Plantar pressure distribution in gait is not affected by targeted reduced plantar cutaneous sensation

Höhne, Angela; Stark, Christian; Brüggemann, Gert–Peter

doi:10.1016/j.clinbiomech.2009.01.001

Cited by 29 publications

(11 citation statements)

References 33 publications

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“…Plantar tactile vibration was applied to reduce the signal-to-noise ratio of peripheral somatosensory inputs, driving the system to reweight multisensory input. During locomotion, plantar pressure distributions in gait are not affected by systematic reductions in cutaneous sensitivity (Hohne et al 2009; Zhang and Li 2013). Here, this is observed in the apparent absence of plantar tactile vibration driven effects on locomotor parameters.…”

Section: Discussionmentioning

confidence: 99%

Plantar tactile perturbations enhance transfer of split-belt locomotor adaptation

et al. 2015

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Patterns of human locomotion are highly adaptive and flexible, and depend on the environmental context. Locomotor adaptation requires the use of multisensory information to perceive altered environmental dynamics and generate an appropriate movement pattern. In this study, we investigated the use of multisensory information during locomotor learning. Proprioceptive perturbations were induced by vibrating tactors, placed bilaterally over the plantar surfaces. Under these altered sensory conditions, participants were asked to perform a split-belt locomotor task representative of motor learning. Twenty healthy young participants were separated into two groups: no-tactors (NT) and tactors (TC). All participants performed an overground walking trial, followed by treadmill walking including 18 minutes of split-belt adaptation and an overground trial to determine transfer effects. Interlimb coordination was quantified by symmetry indices and analyzed using mixed repeated measures ANOVAs. Both groups adapted to the locomotor task, indicated by significant reductions in gait symmetry during the split-belt task. No significant group differences in spatiotemporal and kinetic parameters were observed on the treadmill. However, significant groups differences were observed overground. Step and swing time asymmetries learned on the split belt treadmill, were retained and decayed more slowly overground in the TC group whereas in NT, asymmetries were rapidly lost. These results suggest that tactile stimulation contributed to increased lower limb proprioceptive gain. High proprioceptive gain allows for more persistent overground after-effects, at the cost of reduced adaptability. Such persistence may be utilized in populations displaying pathologic asymmetric gait by retraining a more symmetric pattern.

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Section: Discussionmentioning

confidence: 99%

Plantar tactile perturbations enhance transfer of split-belt locomotor adaptation

et al. 2015

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“…Zhang and Li [16] examining the effects of chronic sensory loss due to peripheral neuropathy, did not find any consequence on plantar pressure distribution in walking and standing. Höhne et al [17] found that plantar pressure distribution in gait is not affected by targeted reduced plantar cutaneous sensation. Beside, other studies [18][19][20][21] reported that reducing the plantar cutaneous sensation altered the walking pattern, modifying the pressure distribution and inducing greater postural sway.…”

Section: Discussionmentioning

confidence: 99%

Skin Hardness and Epidermal Thickness Affect the Vibration Sensitivity of the Foot Sole

Jammes¹,

Viala²,

Weber³

et al. 2017

Clin Res Foot Ankle

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Objective: The cutaneous mechanoreceptors of the foot sole detect the changes in the application of mechanical loads on the plantar surface during gait and standing, and contribute to controlling the standing balance and postural reflexes in healthy subjects. A local thickening of the foot sole skin occurs in response to repetitive load application. We hypothesized that an elevated skin hardness of the foot sole could reduce its mechano sensitivity. Methods:In healthy subjects, we quantified the sensation produced by different amplitudes of vibratory stimulations at two frequencies (25 and 150 Hz). The vibration threshold was determined on the 1 st or 2 nd , and 5 th metatarsal heads, and the heel at each vibration frequency. The Stevens power function (Ψ=k.Φ n ) allowed to obtain regression equations between the estimate (Ψ) of the vibratory stimuli and their physical magnitude (Φ). Any increase in the absolute k value (all were negative) indicated a reduced sensitivity to the lowest loads. The n coefficient measured the global perception. The highest skin hardness (Shore) was measured on the 5th metatarsal head and the heel. In some subjects, superficial skin abrasion of the 5 th metatarsal head was performed and the vibration sensitivity was tested again. Results:The vibration threshold was significantly higher at the level of the 5 th metatarsal head and the heel. The k value was significantly higher at the 25 and 150 Hz frequencies for the 5 th metatarsal head, and only at 25 Hz for the heel. At both vibration frequencies, negative correlations were obtained between the k values and skin hardness. After skin abrasion, the n coefficient was significantly higher at both vibration frequencies. Conclusion:Skin hardness affects the foot sole mechano sensitivity and could alter the control of posture during standing and walking. This indicates that foot care by podiatrist are relevant to improve posture control.

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“…In rehabilitation medicine, plantar stress distribution is considered to be an important reference for the study of certain diseases [3]. Moreover, in orthopedic surgery, plantar stress measurement is considered to be the key technology for gait research [4].…”

Section: Introductionmentioning

confidence: 99%

Transfer Function of Interfacial Stress Sensor for Artificial Skin Applications

Lü

Sundara-Rajan

et al. 2013

IEEE Trans. Electron Devices

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To help improve the comfort of an amputee, it is important to develop artificial skin to understand the load distribution between the residual limb and the prosthetic socket for a prosthetic socket system. This paper presents an interfacial stress sensor which is capable of simultaneously measuring normal compressive stress and horizontal shear stress and is expected to create an artificial skin to understand such load distribution. A mathematical model based on regression analysis is built and an experiment is conducted to obtain the transfer function of the sensor. A significance test shows that the transfer function has a statistical significance at a significance level of 0.05 and the regression model fits the experimental data with a sample determination coefficient (R 2 ) > 0.95. The relative error is also analyzed in the end. The results show that the sensor is capable of measuring a range 0-320 kPa normal compressive stress with a relative error of 5% and a range of 0-70 kPa horizontal shear stress with a relative error of 14%.Index Terms-Artificial skin, interfacial stress sensor, prosthetic socket, residual limb, transfer function.

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Plantar pressure distribution in gait is not affected by targeted reduced plantar cutaneous sensation

Cited by 29 publications

References 33 publications

Plantar tactile perturbations enhance transfer of split-belt locomotor adaptation

Plantar tactile perturbations enhance transfer of split-belt locomotor adaptation

Skin Hardness and Epidermal Thickness Affect the Vibration Sensitivity of the Foot Sole

Transfer Function of Interfacial Stress Sensor for Artificial Skin Applications

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