Elon Musk's Neuralink brain implant to ultimately help humans merge with AI is sparking debate over safety and ethics

• Elon Musk's brain chip company Neuralink has begun implanting its devices in humans.
• Neuralink's initial goals are to treat neurological conditions like paralysis and blindness.
• But Musk has expressed a deeper ambition to use the implants to merge humans with AI.

Elon Musk's secretive and futuristic brain-chip company, Neuralink, has begun implanting its devices in human skulls — and like many of Musk's ventures, the new technology has been met with both fanfare and skepticism.

The US Food and Drug Administration granted Neuralink approval in 2023 to begin testing the implant in humans. The company inserted a chip into its first human patient in January of 2024, and Musk said the early results showed "promising neuron spike detection."

Musk, who also runs companies like Tesla and SpaceX, named the first product Telepathy, and announced that the product will enable humans to control a phone or computer "just by thinking."

What does Neuralink's brain chip do?

Musk and Neuralink have publicly flaunted a variety of goals for the implanted devices, some of which are intended for the near future, while others are long-term ambitions.

Neuralink's current priority is to treat patients with neurological conditions, such as paralysis and blindness. Initially, in the first human trial, Neuralink's goal is to help patients with paralyzed limbs control devices like a computer mouse or keyboard with only their thoughts. 

Musk has reported some success on this front, saying in February 2024 that Neuralink's first human patient was able to move a mouse cursor around the screen. Musk said the next near-term goal is for patients to hold a button down with their minds.

In the future, Neuralink aims to restore full mobility to paralyzed patients and sight to blind or visually impaired patients.

"Imagine if Stephen Hawking could communicate faster than a speed typist or auctioneer. That is the goal," Musk said in January of 2024. 

But Musk's ambitions don't stop with simply treating medical conditions — much like his space-exploration company SpaceX, Musk's ambitions for Neuralink are to break technological frontiers.

Musk has said he wants Neuralink to ultimately help humans achieve "symbiosis" with artificial intelligence so that they don't get "left behind" as AI evolves over time.

"In the long term, Neuralink hopes to play a role in AI risk civilizational risk reduction by improving human to AI (and human to human) bandwidth by several orders of magnitude," Musk said on X, formerly known as Twitter, in 2023.

Musk has also referred to the device as a "Fitbit in your skull," and floated ideas like using the devices to allow people to save and replay memories.

"The future is going to be weird," Musk told a crowd in 2020.

Who can get the Neuralink?

Neuralink began recruiting prospective patients in late 2023, shortly after receiving FDA clearance for a human trial. Immediately, thousands of people expressed interest in Neuralink's brain implant surgery.

But Neuralink's application comes with an eligibility screener — not just anyone can sign up. Patients must be legal adults, they must hold US citizenship or permanent resident status, and they must have one of the following conditions: "Quadriplegia, paraplegia, visual impairment or blindness, aphasia or the inability to speak, hearing impairment or deafness, and/or major limb amputation (affecting above or below the elbow and/or above or below the knee)."

Neuralink has said it's specifically searching for individuals with quadriplegia, at least 22 years old, and who have a "consistent and reliable caregiver." The company has also ruled out anyone with active implanted devices like pacemakers, anyone with ongoing conditions that require MRIs, and people with a history of seizures.

Applicants selected to participate in Neuralink trials will have to participate in a roughly 18-month-long primary study, involving nine at-home and in-person visits, and two weekly hour-long research sessions. The trials also involve long-term follow-up visits over a period of five years.

How ethical is Neuralink?

Like several of Musk's companies, Neuralink has come under ethical scrutiny — both for its existing research practices and potential moral quandaries that could unfold in the future as the technology advances.

Critics have frequently assailed Neuralink's missed projections for human trials. Musk had initially promised in 2019 that human trials would begin the following year, but it wasn't until 2024 that the first patient received the brain chip.

Neuralink's animal testing practices have also made headlines in recent years. In 2022, an animal-rights group obtained more than 700 pages of public records indicating that monkeys used in Neuralink research underwent "extreme suffering as a result of inadequate animal care and highly invasive experimental head implants during the experiments."

Neuralink rejected allegations that monkeys were mistreated and said in a statement that the company is "committed to working with animals in the most humane and ethical way possible." Musk later said the test monkeys live in "monkey paradise."

The FDA rejected Neuralink's bid initially to launch human trials, citing concerns that the implant would overheat, move around in the brain, or even damage brain tissue. Neuralink apparently resolved those concerns. However, because, in the spring of 2023, the FDA approved Neuralink's first human trials.

What are the risks of Neuralink?

In addition to typical risks of neurological surgery, scientists have also questioned the unintended consequences that could arise from merging the human brain with computers.

In recent years, even the very concept of a brain chip has come under ethical scrutiny. Neuralink is far from the only company building and testing what's known as a brain-computer interface — meaning, a device that allows a brain to communicate with a computer — and researchers have found both benefits and downsides for patients who have received BCIs for medical purposes.

Researchers have reported that while many patients undoubtedly benefit from the technology, others have experienced feelings of being unable to recognize themselves or losing their sense of self — a phenomenon known as "estrangement." 

Bridging the gap between a computer and a human brain also poses ethical quandaries about privacy and security. Experts have speculated that computers could access, decipher, and store brain activity, leaving that data vulnerable to hackers.

Musk has appeared largely unconcerned, however, and has pledged several times to implant a Neuralink device in his own brain.

How successful have Neuralink implantations been?

Though Neuralink's brain chip has only been implanted in one human, the company has tested it in a number of pigs and monkeys.

In 2020, Neuralink revealed it had implanted a chip in the skull of a pig named Gertrude. The company released footage showing that the chip could record neural activity, and could accurately predict the pig's limb positions as she walked on a treadmill.

Neuralink released further footage in 2021 showing a monkey playing video games with its mind. Neuroscientists were unimpressed, telling Business Insider that Neuralink is far from the first to do so — scientists have used neural interfaces to allow monkeys to control computer cursors since 2002.