From Motion to Muscle
- URL: http://arxiv.org/abs/2201.11501v1
- Date: Thu, 27 Jan 2022 13:30:17 GMT
- Title: From Motion to Muscle
- Authors: Marie Dominique Schmidt, Tobias Glasmachers, Ioannis Iossifidis
- Abstract summary: We show that muscle activity can be artificially generated based on motion features such as position, velocity, and acceleration.
The model achieves remarkable precision for previously trained movements and maintains significantly high precision for new movements that have not been previously trained.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Voluntary human motion is the product of muscle activity that results from
upstream motion planning of the motor cortical areas. We show that muscle
activity can be artificially generated based on motion features such as
position, velocity, and acceleration. For this purpose, we specifically develop
an approach based on recurrent neural network that is trained in a supervised
learning session; additional neural network architectures are considered and
evaluated. The performance is evaluated by a new score called the zero-line
score. The latter adaptively rescales the loss function of the generated signal
for all channels comparing the overall range of muscle activity and thus
dynamically evaluates similarities between both signals. The model achieves
remarkable precision for previously trained movements and maintains
significantly high precision for new movements that have not been previously
trained. Further, these models are trained on multiple subjects and thus are
able to generalize across individuals. In addition, we distinguish between a
general model that has been trained on several subjects, a subject-specific
model, and a specific pre-trained model that uses the general model as a basis
and is adapted to a specific subject afterward. The subject-specific generation
of muscle activity can be further used to improve the rehabilitation of
neuromuscular diseases with myoelectric prostheses and functional electric
stimulation.
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