Altered sensory feedback effects on gait

OpenSim Moco is a software toolkit to solve optimal control problems with musculoskeletal models defined in OpenSim using the direct collocation method.
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Adam Zaidel
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Altered sensory feedback effects on gait

Post by Adam Zaidel » Thu Apr 27, 2023 5:00 am

Hi,
I study sensory and perceptual function, and I'm interested in simulating how sensory or perceptual dysfunction affects gait. For that, I would like to take a simple gait model (e.g. example2DWalking) and to adapt it in a way to test how damaged sensory feedback affects gait. Has anyone done something similar before? Is there a way that I can 'hack' sensory feedback in the model to degrade it? The specific sensory deficits that I would like to simulate are:
1) overestimating sensory reliability
2) overestimating the sensory outcomes of one's own actions (e.g. exaggerated forward model)
3) altered multisensory weighting
Thanks
Adam

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Adam Zaidel
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Re: Altered sensory feedback effects on gait

Post by Adam Zaidel » Sun Apr 30, 2023 1:58 am

Trying to focus my question:
How can I add feedback control (e.g. measurement of gait speed) to a gait simulation?

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Ross Miller
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Re: Altered sensory feedback effects on gait

Post by Ross Miller » Sun Apr 30, 2023 4:24 am

Hi Adam,

Moco I think only does open-loop controls in its present state. It is possible to use direct collocation methods on closed-loop control problems (recent example: https://journals.plos.org/ploscompbiol/ ... bi.1009338) but doing so in Moco I think would take a fairly substantial revision of its core code and method.

Ross

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