Feb 9, 2015

Decoding of human hand actions to handle missing limbs in Neuroprosthetics

BioRxiv : the Preprint Server for Biology
Jovana J Belić, A Aldo Faisal

Abstract

The only way we can interact with the world is through movements, and our primary interactions are via the hands, thus any loss of hand function has immediate impact on our quality of life. However, to date it has not been systematically assessed how coordination in the hand’s joints affects every day actions. This is important for two fundamental reasons. Firstly, to understand the representations and computations underlying motor control “in-the-wild” situations, and secondly to develop smarter controllers for prosthetic hands that have the same functionality as natural limbs. In this work we exploit the correlation structure of our hand and finger movements in daily-life. The novelty of our idea is that instead of averaging variability out, we take the view that the structure of variability may contain valuable information about the task being performed. We asked seven subjects to interact in 17 daily-life situations, and quantified behaviour in a principled manner using CyberGlove body sensor networks that, after accurate calibration, track all major joints of the hand. Our key findings are: 1. We confirmed that hand control in daily-life tasks is very low-dimensional, with four to five dimensions being sufficient to explai...Continue Reading

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Mentioned in this Paper

Hand
Intention - Mental Process
Articular System
TCAP gene
Brain
Fingers
Transcription Initiation
Expectation Maximization Algorithm
Joints
Limb Structure

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