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Muscle Coordination and Action

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Biohybrid hand actuated by multiple human muscle tissues.

Xinzhu Ren¹, Yuya Morimoto^1,2, Shoji Takeuchi¹

¹Department of Mechano-Informatics, Graduate School of Information Science and Technology, University of Tokyo, Tokyo, Japan.

Science Robotics

|February 12, 2025

Summary

New biohybrid robots use multiple muscle tissue actuators (MuMuTAs) to power a hand with individually controlled fingers. This advancement offers greater flexibility and control for complex biohybrid robotic systems.

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Area of Science:

Biohybrid robotics
Tissue engineering
Biomechanical engineering

Background:

Cultured muscle tissue is explored as a power source for biohybrid robots.
Current designs face limitations in scale, flexibility, and control.

Purpose of the Study:

To develop a biohybrid hand with enhanced flexibility and controllability.
To utilize multiple muscle tissue actuators (MuMuTAs) for powering robotic systems.

Main Methods:

Development of multijointed fingers powered by MuMuTAs, which are bundles of thin muscle tissues.
Conversion of linear actuation from MuMuTAs into finger flexion using a cable-driven mechanism.
Implementation of diverse signaling controls for individual finger actuation.

Main Results:

Successful powering of a biohybrid hand with individually controlled fingers.
Demonstration of a variety of motions achievable through different signaling controls.
MuMuTAs provide high contractile force (~8 mN) and length (~4 mm).

Conclusions:

MuMuTAs offer a viable and powerful actuation solution for advanced biohybrid robotics.
This study demonstrates the potential for complex, controlled movements in biohybrid systems.
The developed biohybrid hand represents a significant step towards more sophisticated biohybrid robotic applications.