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Issue title: Advances in Rehabilitation for Functional Neurological Disorder
Guest editors: Victor W. Mark
Article type: Review Article
Authors: Mark, Victor W.a; b; c; *
Affiliations: Department of Physical Medicine and Rehabilitation, University of Alabama at Birmingham, Birmingham, AL, USA | Department of Neurology, University of Alabama at Birmingham, Birmingham, AL, USA | Department of Psychology, University of Alabama at Birmingham, Birmingham, AL, USA
Correspondence: [*] Address for correspondence: Victor Mark, 619 19th Street South, SRC 190, Birmingham 35249, AL, USA. Tel.: +1 205 934 3499; Fax: +1 205 975 4524; E-mail: vwmark@uabmc.edu.
Abstract: BACKGROUND:The term “functional neurological disorder,” or “FND,” applies to disorders whose occurrence of neurological symptoms fluctuate with the patient’s attention to them. However, many other disorders that are not called “FND” nonetheless can also follow this pattern. Consequently, guidelines are unclear for diagnosing “FND.” OBJECTIVE:To review the neurological conditions that follow this pattern, but which have not so far been termed “FND,” to understand their overlap with conditions that have been termed “FND,” and to discuss the rationale for why FND has not been diagnosed for them. METHOD:A systematic review of the PubMed literature registry using the terms “fluctuation,” “inconsistency,” or “attention” did not yield much in the way of these candidate disorders. Consequently, this review instead relied on the author’s personal library of peer-reviewed studies of disorders that have resembled FND but which were not termed this way, due to his longstanding interest in this problem. Consequently, this approach was not systematic and was subjective regarding disease inclusion. RESULTS:This review identified numerous, diverse conditions that generally involve fluctuating neurological symptoms that can vary with the person’s attention to them, but which have not been called “FND.” The literature was unclear for reasons for not referring to “FND” in these instances. CONCLUSION:Most likely because of historical biases, the use of the term “FND” has been unnecessarily restricted. Because at its core FND is an attentionally-influenced disorder that can respond well to behavioral treatments, the field of neurological rehabilitation could benefit by extending the range of conditions that could be considered as “FND” and referred for similar behavioral treatments. Because the term “FND” has been viewed unfavorably by some patients and clinical practitioners and whose treatment is not implied, the alternative term attentionally-modifiable disorder is proposed.
Keywords: Functional neurological disorder, history of neuroscience, motor, physical therapy, occupational therapy, speech-language pathology, MRI, cognitive behavioral therapy
DOI: 10.3233/NRE-228003
Journal: NeuroRehabilitation, vol. 50, no. 2, pp. 179-207, 2022
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