Engineered muscle systems having individually addressable distributed muscle actuators controlled by optical stimuli

Area of Science:

• Biomedical Engineering
• Robotics
• Optogenetics

Background:

• Traditional robotic systems rely on electric motors and fixed joints.
• Actuating complex, non-fixed joints like the human jaw or shoulder presents significant engineering challenges.

Purpose of the Study:

• To develop a novel multi-degree-of-freedom system using live skeletal muscles as actuators.
• To explore the design and feasibility of networked, light-activated muscle bio-actuators for robotic applications.

Main Methods:

• Culturing genetically coded muscle precursor cells to create millimeter-scale, 3D skeletal muscle strips.
• Utilizing optogenetics for optical excitation and precise spatiotemporal control of muscle activation.
• Networking multiple muscle bio-actuators to form distributed actuator systems.

Main Results:

• Demonstrated the creation of optically excitable 3D skeletal muscle strips.
• Developed networked muscle bio-actuators capable of activating loads without fixed joints.
• Built functional prototypes showcasing the feasibility of constructing larger-scale muscle-driven robotic systems.

Conclusions:

• Optogenetically controlled muscle bio-actuators offer high spatiotemporal resolution for precise movement control.
• Networked muscle bio-actuators can activate complex, non-fixed joints, expanding robotic design possibilities.
• This approach is feasible for constructing sophisticated, large-scale bio-actuator systems.