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Hierarchy of Motor Control

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Updated: May 6, 2026

A Structured Rehabilitation Protocol for Improved Multifunctional Prosthetic Control: A Case Study

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Biomimetic versus arbitrary motor control strategies for bionic hand skill learning.

Hunter R Schone^1,2,3,4, Malcolm Udeozor⁵, Mae Moninghoff⁵

¹Laboratory of Brain and Cognition, National Institute of Mental Health, National Institutes of Health, Bethesda, MD, USA. schonehunter@gmail.com.

Nature Human Behaviour

|March 19, 2024

Summary

Biomimetic control offers faster initial learning for bionic hands, but arbitrary control leads to better long-term adaptation and generalization. A flexible strategy combining both may be optimal for bionic limb control.

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Last Updated: May 6, 2026

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Area of Science:

Biomedical Engineering
Neuroscience
Rehabilitation Robotics

Background:

Designing anthropomorphic bionic limbs that mimic biological control (biomimetic) is an engineering goal.
It is assumed biomimetic control enhances embodiment, learning, generalization, and automaticity in users.
However, the effectiveness of biomimetic versus non-biomimetic strategies requires empirical testing.

Purpose of the Study:

To compare biomimetic and arbitrary control strategies for learning to use a myoelectric bionic hand.
To evaluate motor learning, embodiment, and generalization in non-disabled participants under different control conditions.

Main Methods:

Participants learned to control a wearable myoelectric bionic hand using an eight-channel electromyography pattern-recognition system.
Two training groups were compared: biomimetic (mimicking gestures) and arbitrary control (unrelated gestures).
Motor learning was assessed across days and behavioral tasks.

Main Results:

Both groups showed improved bionic hand control, reduced cognitive load, and increased embodiment.
Biomimetic control resulted in more intuitive and faster initial learning.
Arbitrary control users matched biomimetic performance later and demonstrated superior generalization to new control strategies.

Conclusions:

Biomimetic and arbitrary control strategies offer distinct advantages for bionic limb use.
The optimal control strategy is likely a flexible approach along the biomimetic-arbitrary spectrum, tailored to individual user needs and training contexts.