Scientists are making major progress in creating synthetic biological machines that include working neurons. This breakthrough could transform artificial intelligence, medical testing, and robotics. Researchers from institutions worldwide are developing "bio-hybrid robots" and "neurobots" that integrate living brain cells or artificial neurons designed to act like real ones. These innovations promise to make computers vastly more energy-efficient and open new ways to study and treat neurological diseases.[nationalgeographic+2]
Living Brain Cells Guide New Robots
Teams of scientists are teaching tiny clusters of human brain cells, called organoids, to control robots. Chinese scientists at Tianjin University and the Southern University of Science and Technology (SUSTech) developed a system named MetaBOC. This system allows brain organoids to control robots in virtual settings and real-world tests.The MetaBOC project acts as a bridge between bio-computers, which have "brains on a chip," and traditional electronic systems. Organoids receive sensor data as electrical signals, interpret them, and learn to perform tasks.[futura-sciences+2]
In the United States, researchers successfully linked brain organoid neurons to a robot's control system. This allowed the organoid to receive feedback from the robot and send commands to direct its actions.For example, when the robot hit an obstacle, it sent a signal to the organoid. The organoid then fired a neural response in less than 50 milliseconds, telling the robot to change its path.Similarly, the University of Bristol's Ben Ward-Cherrier and his team are integrating organoids into robots to serve as their "brain," helping them learn on the go. His team used organoids to create a system that reads Braille characters with 83 percent accuracy.[reddit+2]
Artificial Neurons Mimic Biology
Beyond using actual living brain cells, other scientists are building artificial neurons that function much like biological ones. Engineers at the University of Massachusetts Amherst have developed an artificial neuron using bacterial protein nanowires. This neuron operates at an extremely low voltage of 0.1 volts, which is similar to the electrical signals in natural brain cells.This low voltage allows the artificial neuron to communicate directly and seamlessly with biological cells, unlike earlier versions that required much stronger signals.[sciencedaily+4]
Jun Yao, an engineer at UMass Amherst, explained that previous artificial neurons used ten times more voltage and 100 times more power than their new creation.This makes their artificial neuron able to "whisper" to biological neurons, enabling direct interaction.The protein nanowires come from Geobacter sulfurreducens bacteria, known for producing electricity.This innovation could lead to highly energy-efficient, bio-inspired computers and wearable electronics that can connect directly with living tissue.[sciencealert+5]
Self-Organizing Biological Robots Emerge
Another significant development involves creating "neurobots" that can form their own functional nervous systems. Researchers at Tufts University and the Wyss Institute developed these tiny living robots using frog embryonic cells.These neurobots are integrated with neuronal precursor cells during their formation.The implanted cells mature into neurons, developing features like axons and dendrites, and forming primitive neural networks.[wyss+5]
Michael Levin, a professor at Tufts University, noted that this approach allows scientists to study how neurons organize on their own within a biological body that can exhibit behavior.These self-organizing nervous systems give neurobots complex movement patterns and unique behaviors.The long-term vision is that biobots, made from a patient's own cells, could one day be used to repair nerve damage, clear blockages in arteries, or deliver drugs within the human body.[now+3]
Speeding Up Brain Organoid Development
To further advance this field, researchers are finding ways to mature brain organoids faster. Scientists at UC San Diego Sanford Stem Cell Institute have developed a new method called Graphene-Mediated Optical Stimulation (GraMOS). This technique uses graphene, a one-atom-thick sheet of carbon, to stimulate human brain organoids with light.GraMOS helps organoids form stronger connections and more organized networks.[reddit+2]
Alysson Muotri, a professor at UC San Diego, called this a "game-changer" for brain research.This method accelerates organoid development without altering their genetic code.This is especially important for modeling age-related conditions like Alzheimer's disease.In tests, graphene-stimulated organoids were even able to control robotic devices in real-time.[today+3]
Broad Impact on Computing and Health
These advancements in synthetic biological machines with working neurons have far-reaching implications. One major benefit is the potential for vastly more energy-efficient computing. The human brain uses significantly less energy than traditional computers to perform complex tasks.Johns Hopkins research suggests biocomputing could reduce AI energy consumption by "1 million to 10 billion times."Ben Ward-Cherrier from the University of Bristol stated that large organoids for power-efficient neural networks could help run complex deep learning models without greatly impacting climate change.[nationalgeographic+4]
In medicine, these bio-hybrid systems offer a more humane and effective way to test drugs and understand neurological conditions.Researchers can grow organoids from a patient's stem cells to test how specific drugs affect their unique neurons or screen for neurotoxic effects, avoiding animal testing.This also helps in creating more reproducible neurological disease studies.The global market for biohybrid robotics is projected to reach $38 billion by 2030, showing the significant investment and interest in this field.[nationalgeographic+5]
While the technology is still in its early stages, with current brain cells in computer circuits being immature, the rapid progress points to a future where biology and technology are increasingly intertwined.Scientists aim to create systems that can learn, adapt, and even heal, potentially leading to new treatments for brain damage and more advanced forms of artificial intelligence.[nationalgeographic+5]
