functional neurological disorder

Trial By Error: My Request for Correction of Causal Claim for Functional Neurological Symptoms

By David Tuller, DrPH This morning I sent the following letter to CNS Spectrums, a neuroscience journal published by Cambridge University Press. Subject line: “Correction needed for etiological statement in ‘Functional neurological symptoms occur commonly in healthy adults: implications for the pathophysiology of FND.’” Depending on the response, or lack of one, I might also …

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Trial By Error: So FND Is Not Only a Brain “Software” Issue After All…

*Kim H, a FND patient with whom I have frequently exchanged views, has left a comment below. I urge others to read it. I disagree with her interpretation, but I certainly think she has a right to express her perspective. However, I stand by my post. ********** By David Tuller, DrPH For years*, experts in …

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Trial By Error: Study Finds Signs of “Functional Limb Weakness” in Patients Not Reporting Actual Limb Weakness

By David Tuller, DrPH *NOTE: Kim, an FND patient and advocate, has left an extensive set of criticisms in the comments. I urge those interested in this debate to read them. A recently published study about functional neurological disorder (FND) has reported some perplexing data. Of almost 300 patients diagnosed with Long Covid, 100 were …

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Trial By Error: Null Results in Physiotherapy Trial for Functional Motor Disorder

By David Tuller, DrPH *May 28, 2026: After I posted this blog last year, two FND patients and a physical therapist specializing in FND posted critical comments. Unknown to me, those comments were blocked for some reason by the algorithm. I have no idea why, but I apologize to those whose comments have been blocked. …

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Trial By Error: Leading FND Site Confirms Criticisms on Prevalence Outlined in Our Letter to Neurology Journal

By David Tuller, DrPH In two recent posts, here and here, I wrote about our letter on inflated prevalence claims for functional neurological disorder (FND) and about the response from the authors of the study we criticized. The 2021 article in NeuroImage: Clinical, “Neuroimaging in functional neurological disorder: state of the field and research agenda,” asserted …

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Trial By Error: Update on Our Letter Concerning the Prevalence of Functional Neurological Disorder

By David Tuller, DrPH In August, I submitted a letter to NeuroImage: Clinical concerning inflated rates of prevalence of functional neurological disorder, on behalf of myself and nine colleagues. After the letter went through peer review and a round of revisions, I was informed in early November that it had been accepted, as I noted …

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