functional neurological disorder

Trial By Error: Letter to Journal about Inflated Claims of FND Prevalence

By David Tuller, DrPH I have spent some time trying to correct the record on the reported prevalence of functional neurological disorder (FND). As I have documented, leaders of the FND field have spent the last decade misrepresenting the findings of a seminal 2010 study, Stone et al, to claim that this diagnosis is the …

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Trial By Error: A Letter Requesting Corrections of Inflated Prevalence Rates in Nine More FND Papers

By David Tuller, DrPH Several colleagues and I recently wrote to the journal NeuroImage: Clinical to request a correction in a 2021 article about functional neurological disorder (FND). The article included the false claim that a seminal 2010 study found that FND was the second-most-common diagnosis at outpatient neurology clinics. In fact, FND—called conversion disorder …

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Trial By Error: FND Experts Agree To Correct Inflated Prevalence Claim

By David Tuller, DrPH For years, experts in functional neurological disorder (FND) have cited a seminal study in their field to claim that the diagnosis was the second-most-common presentation at outpatient neurology clinics, with a prevalence of 16%. This claim was, and is, categorically untrue. The Scottish Neurological Symptoms Study (SNSS), which yielded multiple papers …

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Trial By Error: A Letter Regarding Inflated Prevalence Rates for Functional Neurological Disorder

By David Tuller, DrPH I have posted previously about how papers on functional neurological disorder (FND) have routinely mis-cited a seminal 2010 study in asserting that the diagnosis is the second-most-common presentation at neurology clinics, with a rate of 16%. In fact, the 2010 study found that only 5.5% had FND, the new name for …

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Trial By Error: Questions About the Prevalence of Functional Neurological Disorder and the Research on Hoover’s Sign for Functional Leg Weakness

By David Tuller, DrPH(This is a long-ish post. Sorry! It covers two complicated issues. I want to thank an intrepid source for help with this.) I have great sympathy for patients diagnosed with functional neurological disorder (FND). Their symptoms can be seriously disabling and their plight has long been neglected and dismissed by the medical …

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Trial By Error: Can Functional Neurological Disorder Be an Indication of Prion Disease?

By David Tuller, DrPH A recent article in the Journal of Neurology presents a twist on the issue of functional neurological disorder (FND). The article, which was published in September, is called “Functional neurological symptoms as initial presentation of Creutzfeldt‐Jakob disease: case series.” Creutzfeldt-Jakob disease is a prion disorder that leads to dementia and death, …

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