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Development of a simulation platform to study the role of joint hyper-resistance...

Development of a simulation platform to study the role of joint hyper-resistance in functional tasks in children with cerebral palsy. Joint hyper-resistance to movement affects 85% of children with cerebral palsy (CP), the most common cause of physical disability in children. Joint hyper-resistance is an important treatment target in CP. Yet, its contribution to... ver más

30/09/2024

KU Leuven

192K€

Presupuesto del proyecto: 192K€

Líder del proyecto

KATHOLIEKE UNIVERSITEIT LEUVEN No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Financiación concedida El organismo HORIZON EUROPE notifico la concesión del proyecto el día 2024-09-30

Línea de financiación objetivo El proyecto se financió a través de la siguiente ayuda:

HORIZON-MSCA-2021-PF-01-01: MSCA Postdoctoral Fellowships 2021

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KU Leuven

191.76K€ | Lider

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Duración del proyecto: 24 meses Fecha Inicio: 2022-09-16
Fecha Fin: 2024-09-30

Líder del proyecto

KATHOLIEKE UNIVERSITEIT LEUVEN

TRL 4-5

Presupuesto del proyecto 192K€

Descripción del proyecto Joint hyper-resistance to movement affects 85% of children with cerebral palsy (CP), the most common cause of physical disability in children. Joint hyper-resistance is an important treatment target in CP. Yet, its contribution to gait and balance impairments is poorly understood because it has been hard to associate clinical test outcomes to gait and balance deficits. Here, we will test a novel hypothesis about the mechanisms underlying joint hyper-resistance. We hypothesize that the neural component of joint hyper-resistance results from movement history-dependent muscle mechanics and its interaction with background muscle activity and hyperactive reflexes. The movement history-dependent muscle force response to stretch, which drives spindle firing and reflex activity, might explain why it has been so hard to relate clinical test outcomes to functional impairments. Indeed, movement history might be very different when walking than when relaxing during a clinical test. However, it is unfeasible to measure muscle and spindle responses to stretch non-invasively. Hence, we will use computer simulations to test whether the proposed mechanism can explain the response to stretch in clinical tests, during perturbed standing balance, and during walking. This requires two extensions to existing simulation frameworks. First, we will integrate more mechanistic muscle models in whole body simulations of movement as the commonly used phenomenological Hill models do not accurately capture the response to stretch. Second, we will account for uncertainty due to sensorimotor noise when simulating whole body movement as such uncertainty might trigger muscle stretch and maladaptive responses. I will build on my own and the host’s experience to realize these computationally challenging modeling developments. This project might improve the diagnosis and treatment of joint hyper-resistance in CP and has thereby the potential to improve the quality of life of many individuals with CP.

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