The right to think freely in the age of neurotechnology

The United Nations has warned that advances in technology capable of monitoring and interpreting human brain activity could pose serious threats to fundamental human rights, particularly as such devices move from hospitals into workplaces, consumer products and criminal investigations. 

In a new report, UN Secretary-General António Guterres raised concerns that information collected directly from the brain could eventually be used by authorities to investigate suspects, assess their mental states or influence their behavior, raising questions about privacy, consent and freedom of thought.

The report, dated August 27 and brought to international attention in early October, was formally presented to the UN General Assembly on October 15 by Assistant Secretary-General for Human Rights Claudia Fuentes Julio. She warned that technologies capable of recording and interpreting brain activity could threaten privacy, freedom of thought and the right to a fair trial.

The warning comes as neurotechnology, once largely confined to medical research and treatment, is finding new applications. Brain implants are already helping some patients with paralysis control computers, while other technologies are being developed to restore movement and communication. These medical breakthroughs demonstrate the technology's potential, but their expansion into commercial and government settings has prompted concerns about how information collected from the brain could be accessed and used.

From medicine to everyday technology

Neurotechnology encompasses devices that monitor, interpret ,or influence activity in the nervous system. Some operate through electrodes implanted in the brain, while others use noninvasive methods such as electroencephalography, or EEG, to record electrical signals from the scalp.

Its medical applications are already substantial. Deep brain stimulation can alleviate symptoms of Parkinson's disease, while brain-computer interfaces can translate certain neural signals into commands for external devices.

In 2024, Neuralink, the brain-implant company founded by Elon Musk, implanted a device in a patient with paralysis who subsequently demonstrated the ability to control computer applications through neural activity. Similar advances are emerging in China, where Shanghai-based NeuroXess developed a fully implanted, wireless brain-computer interface that enabled a paralyzed patient to control a computer cursor within five days of surgery in December 2025.

But commercial applications present different concerns. EEG-equipped headsets marketed for gaming, wellness, and productivity can generate information about users' neurological activity. Depending on their capabilities and processing methods, such devices may allow companies to infer aspects of attention or cognitive state.

Unlike conventional personal information, neural data originates in physiological processes that individuals cannot always consciously control. Its collection therefore raises difficult questions about consent, particularly when participation is linked to employment, education or access to services.

When brain data enters the courtroom

The UN's latest warning focuses particularly on the consequences of introducing neurotechnology into criminal investigations and judicial proceedings.

Neural signals can provide information about certain cognitive processes, but interpreting them requires specialized equipment, algorithms, and carefully controlled conditions. They cannot simply be treated as direct records of thoughts, intentions or truthfulness. Nevertheless, the prospect of authorities accessing brain-derived information raises concerns about compelled disclosure and the right against self-incrimination.

A March 2026 Council of Europe report examined how existing protections under the European Convention on Human Rights might apply to such practices. Article 6 protects the right to a fair trial, while Article 8 safeguards private life and Article 9 protects freedom of thought. The report also considered circumstances in which coercive interference with mental processes could engage Article 3, which prohibits torture and inhuman or degrading treatment.

These distinctions become particularly consequential when information originally collected for medical or recreational purposes is repurposed for law enforcement. Even without reliable mind-reading capabilities, authorities could assign excessive evidentiary weight to neural measurements whose scientific limitations are poorly understood.

The limits of existing rights

Governments have begun establishing international standards, although enforceable protections remain uneven.

In November 2025, UNESCO adopted its Recommendation on the Ethics of Neurotechnology, establishing an international framework for responsible development and use. The recommendation addresses concerns surrounding human dignity, autonomy, and the protection of sensitive neurological information.

The legal debate, however, concerns more than the introduction of new safeguards. It also involves determining whether established human rights already provide sufficient protection against technological interference with mental processes.

In an October 2026 study published in Neuroethics, researcher Diego Borbón examined this debate across Latin America, arguing that human dignity may offer a stronger immediate legal foundation than freedom of thought in jurisdictions where the latter remains poorly defined. His analysis challenges proposals to create entirely new categories of fundamental rights, known as neurorights, without first establishing how existing guarantees can be enforced.

The effectiveness of these protections will ultimately depend on their enforcement. A constitutional guarantee of mental privacy offers limited protection unless legislation specifies which neural data companies may collect, how long it can be retained and under what circumstances authorities can obtain it.

Regulating access to the mind

The regulatory challenge is complicated by the international nature of neurotechnology development. Devices, software, and neural data can move across jurisdictions with different privacy laws and standards of judicial oversight.

The Council of Europe's March 2026 report emphasized the need for preventive regulation, particularly as private companies develop consumer applications outside traditional medical oversight. Its recommendations include clearer consent requirements, protections for vulnerable users and sector-specific safeguards covering employment, education and criminal justice.

The UN has similarly called for prohibitions on coercive and abusive applications, stronger scientific validation and independent oversight. These measures would not require governments to resolve every philosophical question about consciousness or freedom of thought. They would, however, establish practical limits on the collection and use of information derived from the brain.

As neurotechnology becomes more accessible, protecting mental autonomy will depend not only on what machines can discover, but also on what institutions are legally permitted to do with that information.