Ermittlung funktioneller kinetischer Parameter aus der plantaren Druckverteilungsmessung

Mitternacht, Jürgen; Lampe, Renée

doi:10.1055/s-2006-942228

Cited by 16 publications

(8 citation statements)

References 2 publications

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“…To this end, measurements of the plantar pressure distribution inside the shoe were recorded during the gait cycle. Beyond the local distribution of pressure, that yields information regarding dysfunctions such as foot drop, flat foot or club foot, it is also possible to quantify kinetic (force) parameters based on the pressure distribution [6]. The resistance moment of the upper talocrural joint is of central significance in the spastic pes equinus.…”

Section: Discussionmentioning

confidence: 99%

Research on the Performance of the Spastic Calf Muscle of Young Adults With Cerebral Palsy

Lampe

Mitternacht

2011

J Clin Med Res

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BackgroundThe aim of this study was to find an objective graduation of pes equinus in infantile cerebral palsy, especially with regard to functional aspects, to allow a differentiated choice of the therapeutic options. Very often raises the question of whether a surgical lengthening of the Achilles tendon may let expect a functional improvement.MethodsFor this documentation 17 patients with pes equinus and a diagnosis of spastic cerebral palsy, primarily of the lower limbs, and hemiplegia were examined first clinically and then by a procedure for calculating the functional kinetic parameters from an in-shoe plantar pressure distribution measurement (novel pedar-X system), which is used in many orthopedic practices and clinics as a standard measuring device. Using additional video motion analysis, the flexion in the ankle joint and the ankle joint torque were determined. From this the physical performance of the spastically shortened calf muscle was calculated. The course of the curves of torque and joint performance allows a functional classification of the pes equinus.ResultsApproximately three quarters of all pes equinus demonstrated functional activity of the most part of the normal push-off propulsion power. Even the rigid pes equinus was capable of performing push-off propulsion work, provided it converted energy that was absorbed during the heel-strike phase and released it again during the push-off phase. This suggests that the function of paretic ankle joint is better than its kinematics of motion.ConclusionsA heel strike with a pes equinus triggers via stretching stimuli in the muscle-ligament structure reflex motor functions, thereby causing the typical spastic gait pattern. This remarkable gait pattern is often evaluated as dysfunctional and as absolutely requiring correction. However, an aspect possibly neglected in this instance is the fact that this gait pattern may be efficient for the patient and may in fact be a suitable means allowing for economic locomotion despite the cerebral control deficits.KeywordsPes equinus; Cerebral palsy; Pedography; Ankle joint performance

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Section: Discussionmentioning

confidence: 99%

Research on the Performance of the Spastic Calf Muscle of Young Adults With Cerebral Palsy

Lampe

Mitternacht

2011

J Clin Med Res

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“…7,8 The plantar pressure distribution measurements allow for deduction of a number of further functional kinetic parameters, such as the muscular plantar flexion moment. 9 …”

Section: Discussionmentioning

confidence: 99%

Noninvasive diagnostic methods for perceptual and motor disabilities in children with cerebral palsy

2009

Orthop Rev

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The field of neuroorthopedics centers on chronic diseases demanding close clinical monitoring. We shall use several examples to show how the various noninvasive diagnostic instruments can be used to obtain insight into the central nervous system as well as into the musculoskeletal system and its morphology. The choice of the most appropriate method depends on the problem; that is, whether the method is to be applied for clinical use or for basic research. In this report we introduce various technical examination methods that are being used successfully in the fields of pediatrics, orthopedics, and neurology. The major examination instrument in pediatric diagnostics is sonography, which is being used in this report as a research instrument for the biomechanics of the musculoskeletal system, but which also gives insight into neurofunctional sequences. In orthopedics, pedography is used for diagnosing deformities of the feet. In neuroorthopedics for children pedography acts as a functional monitor for apraxia and thus allows, for example, a classification of the degree of neurological malfunctions in the lower extremities. The 3D bodyscan is used to minimize x-raying in patients with neurogenic scoliosis. This report introduces examples of the application of MRI and fMRI for basic research. The biometric measuring methods introduced provide precise data in the areas of diagnostics and monitoring and are highly valuable for further neuroorthopedic basic research. In future we expect the ever-evolving technical measuring methods to enable a deeper understanding of the primary neurological causes of and the implications for patients with cerebral palsy and other neuroorthopedic conditions. This may allow the development of new forms of therapy not necessarily predictable today.

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“…This serves as an input parameter for a design space, which is volume optimized in the next step (Fairclough et al, 2021). The applied loads and constraint locations (Taha et al, 2016;Wong et al, 2016;Mitternacht and Lampe, 2006) of the orthosis…”

Section: Methodsmentioning

confidence: 99%

A New Design Method for Generating Surrogate Kinematic Truss Orthoses to Support Pathological Gait Patterns in Human Model Simulations

et al. 2023

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With increasing life expectancy, the risk of diseases of the central nervous system, such as cancer, strokes, etc., also increases. Strokes often result in injury to the sciatic nerve, which is responsible for controlling the calf muscles (plantar and dorsal flexors). A so-called ankle joint orthosis (AFO) helps to support the pathological gait and to avoid foot drop during gait. Passive orthoses are of particular importance for research, as they do not require additional incoming energy from outside to the orthotic system. However, current passive orthoses are often not personalized. On the one hand, because they usually have only a temporary muscle-building function and, on the other hand, because the individual design process is computationally time consuming and thus expensive. This paper presents a possibility to pre-dimension and pre-design passive orthoses fast and cost-efficiently by reducing the complexity of the model based on volume-optimized truss elements. Therefor a traditional high calculation intensive design procedure is compared with the complexity reduced model to show its effectiviness and the similarity of the results.

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Ermittlung funktioneller kinetischer Parameter aus der plantaren Druckverteilungsmessung

Abstract: The determination of muscular ankle joint moments from the pressure distribution measurement improves the objectivity when reviewing the functional success of a therapy in different orthopaedic or surgical interventions at the foot and ankle joint.

Cited by 16 publications

References 2 publications

Research on the Performance of the Spastic Calf Muscle of Young Adults With Cerebral Palsy

Research on the Performance of the Spastic Calf Muscle of Young Adults With Cerebral Palsy

Noninvasive diagnostic methods for perceptual and motor disabilities in children with cerebral palsy

A New Design Method for Generating Surrogate Kinematic Truss Orthoses to Support Pathological Gait Patterns in Human Model Simulations

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