Bayesian brain model
Posts discussing predictive processing and Bayesian brain theories as explanations for symptoms attributed to Functional Neurological Disorder.
Different Causes, Same Symptoms: A New Theory of Functional Cognitive Disorder Raises Familiar Questions
FND Nope
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A 2026 Brain Sciences paper proposes that functional cognitive disorder and persistent post-concussion symptoms may converge on the same memory networks despite different origins. The theory raises important questions about neurological mechanisms, diagnostic uncertainty, and whether shared symptoms necessarily establish a shared disorder.
FND Study of Nearly 600,000 Patients Reveals Different Biological Patterns Behind Different Symptoms
FND Nope
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A major 2026 study links FND diagnoses to inherited disorders, congenital abnormalities, neurodevelopmental conditions and early-life biological factors. But are these vulnerabilities to FND, or evidence that different biological diseases produce overlapping clinical phenotypes? We examine the findings through the Common Phenotypes Hypothesis.
FND, Compensation and the Convenient Theory That Financial Support Keeps People Disabled
FND Nope
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A 2026 Frontiers in Neurology review explores whether compensation, litigation and financial support can reinforce FND disability. But where is the evidence that paying injured people keeps them sick, and what happens when speculative theories influence legal liability?
Case Study: FND After Spine Surgery
FND Nope
Moderator
A critical look at a case of postoperative paralysis labelled as FND, questioning whether pre-existing neurological instability and predictive processing may better explain the presentation than a purely functional diagnosis.
