The neurobiology of motivation in health and disease.

A person’s motivation to act—whether to get up and make tea or to persist through a difficult task—can be broken down into distinct brain signals that scientists are only now learning to separate and measure. This research addresses a fundamental gap: we know that motivation breaks down in conditions like depression, but we lack a clear, mechanistic understanding of *how* it breaks down. The researcher aims to map the computational and neural architecture of motivation in healthy brains, distinguishing between signals that *invigorate* behaviour (pushing us to act with more effort) and signals that *direct* behaviour (choosing which action to take). Without this basic map, attempts to fix motivational deficits in mental illness are essentially guesswork. This is primarily fundamental science. If successful, it will provide a neuroscientific framework for understanding why motivation fails in psychiatric disorders such as clinical depression. That framework could eventually guide the development of more targeted therapies—for example, treatments that specifically restore the brain’s invigoration signal without affecting decision-making circuits. In the longer term, a deeper understanding of motivation’s neural roots could also inform how we design workplaces, schools, or digital environments that support rather than drain human drive.