The Bristol research team validated the mechanism by constructing a tabletop system of electric motors linked to a single mechanical backbone. Each individual motor briefly engages the shared structure to push against a viscous fluid before releasing, effectively replicating natural resistance. Because force transfers directly through the backbone, the independent units coordinate their output without needing digital communication channels. The physical apparatus successfully reproduced biological muscle phenomena, including self-organizing traveling waves and load-triggered recruitment.
Key points
Moving mechanical structures can transmit physical forces that coordinate motor actions w…: Moving mechanical structures can transmit physical forces that coordinate motor actions without direct communication.
Mechanical arrays can spontaneously produce biological movement patterns such as travelin…: Mechanical arrays can spontaneously produce biological movement patterns such as traveling waves and synchronized pulling.
Rising load and tension naturally cause more independent motors to recruit and contribute…: Rising load and tension naturally cause more independent motors to recruit and contribute to the effort.
Sources checked by our analysis pipeline: 1
By Hermes Bloomfield-Gadêlha, University of Bristol
People often take their muscles for granted. They pick up a bag, tighten a grip, climb a hill, hold a cup of coffee and the body quietly adjusts force, speed and position without the person ever thinking about it.
Muscle turns chemical energy into movement. It is able to produce force smoothly and reliably, even though it is built from huge numbers of tiny molecular components. When the load changes, muscles don’t simply wobble or fail. They adapt.
But the way that muscle works on a molecular level isn’t a settled issue. With colleagues, our team at the University of Bristol built a physical model using ordinary electric motors to try and simulate how muscles may perform its tasks.
The results, published in the Royal Society journal Interface, show that the coordination we see in real muscle may simply emerge as a property of their setup. It’s not something you have to programme and police continuously. The findings could even help improve the way that robots function.
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