Your doctor needs to compare your hand grasps to these normal ones and use protocols to get from your disabled hand to full recovery. NOTHING LESS THAN THAT. Your doctors' responsibility is to cure you, isn't it? Or is that too fucking hard?
A quantitative taxonomy of human hand grasps
- Francesca Stival,
- Stefano MichielettoEmail authorView ORCID ID profile,
- Matteo Cognolato,
- Enrico Pagello,
- Henning Müller and
- Manfredo Atzori
Journal of NeuroEngineering and Rehabilitation201916:28
© The Author(s) 2019
- Received: 23 July 2018
- Accepted: 21 January 2019
- Published: 15 February 2019
Abstract
Background
A proper modeling of human grasping and
of hand movements is fundamental for robotics, prosthetics, physiology
and rehabilitation. The taxonomies of hand grasps that have been
proposed in scientific literature so far are based on qualitative
analyses of the movements and thus they are usually not quantitatively
justified.
Methods
This paper presents to the best of our
knowledge the first quantitative taxonomy of hand grasps based on
biomedical data measurements. The taxonomy is based on electromyography
and kinematic data recorded from 40 healthy subjects performing 20
unique hand grasps. For each subject, a set of hierarchical trees are
computed for several signal features. Afterwards, the trees are
combined, first into modality-specific (i.e. muscular and kinematic)
taxonomies of hand grasps and then into a general quantitative taxonomy
of hand movements. The modality-specific taxonomies provide similar
results despite describing different parameters of hand movements, one
being muscular and the other kinematic.
Results
The general taxonomy merges the
kinematic and muscular description into a comprehensive hierarchical
structure. The obtained results clarify what has been proposed in the
literature so far and they partially confirm the qualitative parameters
used to create previous taxonomies of hand grasps. According to the
results, hand movements can be divided into five movement categories
defined based on the overall grasp shape, finger positioning and
muscular activation. Part of the results appears qualitatively in
accordance with previous results describing kinematic hand grasping
synergies.
Conclusions
The taxonomy of hand grasps proposed in
this paper clarifies with quantitative measurements what has been
proposed in the field on a qualitative basis, thus having a potential
impact on several scientific fields.
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