A person with functional neurological disorder can lose the ability to walk, speak, or hold a limb steady, yet standard scans reveal no lesion, no stroke, no damaged nerve. The problem, a new paper argues, is not in the hardware but in the coordination. Functional neurological disorder, or FND, is increasingly understood as a disorder of network-level dysfunction: altered salience processing, a broken coupling between motor intention and motor execution, and a disrupted sense that one's own body is under one's own control.
That framing matters because it points to a possible intervention aimed at the circuits themselves. In a synthesis article published in Philosophical Transactions of the Royal Society B, Daniela Di Basilio, Alexander J. Casson, and Anthony Jones make the case for neurofeedback, a closed-loop technique in which people learn to modulate their own neural activity in real time by watching a signal derived from their own brain. If FND is a failure of neural coordination, the authors reason, then training patients to nudge the relevant circuits offers what they call a theoretically grounded approach to the disorder.
The motivation is practical. Multi-disciplinary rehabilitation helps many patients, but a proportion continue to experience persistent or fluctuating symptoms, which the authors say points to a need for mechanistically informed adjunctive treatments. Neurofeedback draws on established learning paradigms, both operant and associative, and can be delivered through EEG or fMRI, each with different tradeoffs in what neural target it can reach and how precisely.
What the paper does not do is prove that any of this works for FND. This is an opinion and synthesis article, with no new data. The authors state plainly that empirical evidence for neurofeedback in FND remains preliminary. Much of their contribution is a critical appraisal of methodological variability in the existing literature and a call for standardization, including transparent reporting of neural targets, feedback modality, training dose, and whether gains actually transfer beyond the training session. On the question of efficacy, the honest answer is that the evidence is not yet in.
Still, the proposal reaches toward a deeper question. FND is a condition in which conscious motor intention exists but fails to produce the expected movement, and in which the felt sense of agency over one's own body comes apart. A technique that lets a person observe and steer their own neural activity is, in effect, a way of studying that loop from the inside. Whether restoring the coupling between intention and action can be watched, learned, and repaired remains open, but it is a question worth asking carefully.
Source: https://doi.org/10.1098/rstb.2024.0468