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AAN 2024 | Overlap in etiology between different FND subtypes

Mark Hallett, MD, National Institutes of Health, Bethesda, MD, discusses the overlap in etiology and pathophysiology between different types of functional neurological disorder (FND). FND subtypes are very varied; almost any neurological problem can have a functional counterpart. Psychogenic non-epileptic seizures are the most common form of FND, followed by functional movement disorders, of which there are many kinds. Prof. Hallett explains that hyperactivity of the limbic system is likely to be at play, as well as dysfunction of other brain networks. He also comments on the probable role of mimicry in determining the type of functional symptoms an individual displays. This interview took place at the American Academy of Neurology (AAN) Annual Meeting 2024 in Denver, CO.

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