Skip to Main content Skip to Navigation
Journal articles

Low-Dimensional Motor Control Representations in Throwing Motions

Ana Lucia Cruz Ruiz 1 Charles Pontonnier 2, 3, 1 Georges Dumont 3, 1, *
* Corresponding author
1 MIMETIC - Analysis-Synthesis Approach for Virtual Human Simulation
UR2 - Université de Rennes 2, Inria Rennes – Bretagne Atlantique , IRISA-D6 - MEDIA ET INTERACTIONS
Abstract : In this study we identified a low-dimensional representation of control mechanisms in throwing motions from a variety of subjects and target distances. The control representation was identified at the kinematic level in task and joint spaces respectively, and at the muscle activation level usingt he theory of muscle synergies. Representative features of throwing motions in all of these spaces were chosen to be investigated. Features were extracted using factorization and clustering techniques from the muscle data of unexperienced subjects (with different morphologies and physical conditions) during a series of throwing tasks. Two synergy extraction methods were tested to assess their consistency. For the task features, the degrees of freedom (DoF) and the muscles under study, the results can be summarized as: 1) a control representation across subjects consisting of only two synergies at the activation level and of representative features in the task and joint spaces, 2) a reduction of control redundancy (since the number of synergies are less than the number of actions to be controlled), 3) links between the synergies triggering intensity and the throwing distance, and finally 4) consistency of the extraction methods. Such results are useful to better represent mechanisms hidden behind such dynamical motions, and could offer a promising control representation for synthesizing motions with muscle-driven characters.
Document type :
Journal articles
Complete list of metadata

Cited literature [36 references]  Display  Hide  Download

https://hal.inria.fr/hal-01626143
Contributor : Charles Pontonnier Connect in order to contact the contributor
Submitted on : Monday, October 30, 2017 - 1:09:03 PM
Last modification on : Friday, October 8, 2021 - 6:50:32 PM
Long-term archiving on: : Wednesday, January 31, 2018 - 12:35:14 PM

File

CruzRuizetal_ABB2017.pdf
Files produced by the author(s)

Identifiers

Citation

Ana Lucia Cruz Ruiz, Charles Pontonnier, Georges Dumont. Low-Dimensional Motor Control Representations in Throwing Motions. Applied Bionics and Biomechanics, Hindawi, 2017, 2017, pp.3050917. ⟨10.1155/2017/3050917⟩. ⟨hal-01626143⟩

Share

Metrics

Record views

1000

Files downloads

477