Neuroethics

The ethics of knowing and changing brains: neural data privacy and 'neurorights', cognitive enhancement, incidental findings, consent and identity in brain implants, brain death, and the moral status of brain organoids.

Neuroethics has two strands, as described by the bioethicist Adina Roskies in 2002: the ethics of neuroscience (how research and technology should be done and used) and the neuroscience of ethics (what brain science reveals about moral judgement). The field took off around a 2002 conference in San Francisco, where the term gained wide currency.

Mental privacy and neurorights

Brain-computer interfaces, EEG headsets and wearables collect neural data, which may reveal intentions, emotions or health conditions. Who owns it, and who can sell it? In 2021 Chile became the first country to amend its constitution to protect "mental integrity" and brain activity, following advocacy by the neuroscientist Rafael Yuste and the Neurorights Foundation. In 2024 the US states of Colorado and California passed laws extending privacy protections to neural data. International bodies including UNESCO have worked on guidance for the ethics of neurotechnology.

Cognitive enhancement

Some students and professionals use prescription stimulants such as methylphenidate or modafinil without a medical need, hoping to improve focus. Studies suggest modest effects for some tasks in some people, alongside health risks. Questions include fairness, coercion ("if everyone else does it, must I?") and authenticity of achievement.

Identity, agency and implants

Deep brain stimulation occasionally changes mood or impulsivity; some patients report feeling "not like myself". Who is responsible for actions influenced by a device? What happens when a company stops supporting an implanted device that a patient relies on — as has happened in some trials?

Incidental findings and prediction

Research brain scans sometimes reveal unexpected abnormalities, raising the question of what to tell volunteers. Predictive tests for diseases without a cure — such as Huntington's disease or Alzheimer's biomarkers — raise questions about the right not to know, insurance and discrimination.

Death and consciousness

Neuroscience bears on defining death (brain death criteria), on decisions about patients with disorders of consciousness who may have covert awareness, and on whether increasingly sophisticated brain organoids — or animals with human brain cells — could ever have morally relevant experiences.