A paralyzed individual can now move and sense the hands of others as if they were his own due to an innovative ‘telepathic’ brain implant. “We’ve established a mind-body connection between two distinct individuals,” explains Chad Bouton from the Feinstein Institute for Medical Research in New York.

Bouton theorizes this method could serve as a rehabilitation tool following spinal cord injuries, enabling paralyzed individuals to collaborate and potentially allowing shared experiences from a distance.

Bouton and his team collaborated with Keith Thomas, a man in his 40s who became paralyzed from the chest down after a diving accident in July 2020, losing all movement and sensation in his hands.

In a prior study in 2023, researchers inserted five sets of small electrodes into the part of Thomas’s brain responsible for movement and sensation in his right hand, enabling them to monitor his neural activity through a device affixed to his skull.

By processing these signals through a computer equipped with an artificial intelligence model, the researchers deciphered the neural activity and relayed signals wirelessly to electrodes on Thomas’ forearm, prompting muscle contractions and relaxations that allowed him to move his hand. Thomas also used force sensors on his hands, transmitting signals back to his brain implant, thereby creating a sense of touch. Consequently, he was able to use his mind to pick up and feel objects in his hands for the first time in years.

Now, the team has adapted a similar system that enables Thomas to control and sense through the hands of others. In one experiment, a non-disabled woman was fitted with forearm electrodes and numerous force sensors on her thumb and index finger. Although she did not attempt to move, Thomas was able to open and close her hand by merely imagining the action.

He could also perceive the sensation of her fingers gripping a baseball, a soft foam ball, and a firmer ball in his own hand, distinguishing between them based on their hardness while blindfolded. “It definitely feels strange,” Thomas remarked. “You’ll eventually get accustomed to it.”

Though Thomas could only identify the different balls with 64% accuracy, Bouton believes this figure could be enhanced by optimizing sensor locations and numbers on his hands. They also could not discern the shape of the balls, but Bouton is hopeful that additional brain electrodes and force sensors might enable them to recognize various objects.

In another similar trial, Thomas assisted a paralyzed woman named Kathy DeNapoli in picking up a can and drinking from it, a task she struggled to perform independently due to limited finger movement. “It was genuinely remarkable, how you can assist someone simply by thinking about it,” Thomas expressed.

After several months of working with Thomas, DeNapoli’s grip strength nearly doubled, according to Bouton. DeNapoli’s paralysis isn’t so severe that receiving invasive surgery is morally questionable. While similar gains in grip strength can be achieved through conventional treatments like electrical muscle and spinal cord stimulation, Thomas and DeNapoli found collaborating far more appealing than rehabilitating alone, Bouton added.

“Just conversing about things like, ‘How’s your weekend going?’ can be beneficial. It enhances your self-esteem and theirs,” Thomas states. Bouton shared that the team intends to explore this approach with more individuals next year.

Rob Tyler, who has paralysis and is a lay member of the scientific committee of the spinal cord injury charity Inspire Foundation, perceives potential value in this method for specific paralyzed patients..

“I view this as a convenient option,” he states. “It’s enjoyable to collaborate with other patients who likely share similar experiences. It can greatly enhance someone’s quality of life.” He emphasized that finding the right combination of people with compatible outlooks and motivations will be critical.

Bouton admits numerous ethical concerns regarding who could benefit from this method must be addressed before it can receive broader medical approval, which he aims to achieve within the next decade.

Nonetheless, Bouton asserts that such technology may have applications beyond medical use, such as allowing non-disabled individuals to remotely control or experience sensations through others. “This could represent a new frontier for human connection,” he suggests.

However, it opens up a plethora of ethical dilemmas. “Is it beneficial or detrimental for society if people can control and feel through others?” questions Harris Akram from University College London Hospital. “I can envision using your body to harm another individual, or controlling someone to perpetrate a crime, and then claiming, ‘That wasn’t me.’