Hypothesis
A tag for speculative ideas, alternative explanatory models, and testable propositions intended to generate discussion and further investigation rather than establish conclusions.
Different Causes, Same Symptoms: A New Theory of Functional Cognitive Disorder Raises Familiar Questions
FND Nope
Moderator
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 Fundamentalists”: New Study Exposes Deep Divisions Over Functional Neurological Diagnoses
FND Nope
Moderator
An international study involving 1,853 patients and 400 clinicians reveals profound disagreements over FND diagnoses in autoimmune disease, reports of diagnostic overshadowing, and clinical reasoning that raises important questions about whether neurological symptoms attributed to FND may have different underlying causes.
FND Study of Nearly 600,000 Patients Reveals Different Biological Patterns Behind Different Symptoms
FND Nope
Moderator
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.
Christina Applegate's MS Diagnosis Was Wrong. Five Years Later, She Still Has No Answers
Quackademic
Christina Applegate reveals that doctors have withdrawn her multiple sclerosis diagnosis after five years of debilitating symptoms. Her disability remains, her condition has reportedly worsened, and the search for an explanation starts again. The case raises questions about neurological misdiagnosis and the danger of replacing one incorrect diagnosis with another.
The Emotional Processing Theory of FND: Eight Years Later, Where Is the Proof?
FND Nope
Moderator
A 2019 review proposed that abnormal emotional processing could generate functional neurological symptoms. Nearly eight years later, its central causal mechanism remains unvalidated. We examine the original research, its acknowledged weaknesses, and what subsequent studies have actually established.
FND, Compensation and the Convenient Theory That Financial Support Keeps People Disabled
FND Nope
Moderator
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?
Diagnosed With FND, Died From a Pulmonary Embolism: The Questions Allison Lawlor's Story Raises
FND Nope
Moderator
Allison Lawlor lived with severe neurological symptoms, received an FND diagnosis and later died from a pulmonary embolism. Her story raises important questions about diagnostic uncertainty, thromboembolic risk and why patients owe no loyalty to a diagnosis.
Dismantling FND: When ME/CFS Starts Trespassing on Functional Neurology's Territory
FND Nope
Moderator
Dr. Brayden Yellman and Paige Zuckerman challenge FND, its diagnostic assumptions, and its overlap with ME/CFS. From seizure-like episodes explained by orthostatic intolerance to patients receiving alternative diagnoses, the question is simple: what happens when medicine starts explaining symptoms previously called functional?
When Defending FND Means Missing the Point
Quackademic
David Healy's warning that drug toxicity can disappear behind an FND diagnosis has provoked predictable criticism. But much of the response confuses how FND is supposed to be diagnosed with how it is actually diagnosed. The literature itself shows misdiagnosis, overdiagnosis and diagnostic overshadowing occur. You can dislike Healy's language. You still have to answer his argument.
FND Hope's Founder, a Misdiagnosis, and Sneddon's Syndrome
FND Nope
Moderator
FND treatment is built around assumptions about why symptoms occur. But what happens when those assumptions are wrong? Bridget Mildon's Sneddon's syndrome and Rebel's later ALS diagnosis raise an uncomfortable patient-safety question: how safe is mechanism-specific treatment when the mechanism itself remains uncertain?
