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Mavroudis I, Kazis D, Kamal FZ, Gurzu IL, Ciobica A, Pădurariu M, Novac B, Iordache A. Understanding Functional Neurological Disorder: Recent Insights and Diagnostic Challenges. Int J Mol Sci 2024; 25:4470. [PMID: 38674056 PMCID: PMC11050230 DOI: 10.3390/ijms25084470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Revised: 04/10/2024] [Accepted: 04/15/2024] [Indexed: 04/28/2024] Open
Abstract
Functional neurological disorder (FND), formerly called conversion disorder, is a condition characterized by neurological symptoms that lack an identifiable organic purpose. These signs, which can consist of motor, sensory, or cognitive disturbances, are not deliberately produced and often vary in severity. Its diagnosis is predicated on clinical evaluation and the exclusion of other medical or psychiatric situations. Its treatment typically involves a multidisciplinary technique addressing each of the neurological symptoms and underlying psychological factors via a mixture of medical management, psychotherapy, and supportive interventions. Recent advances in neuroimaging and a deeper exploration of its epidemiology, pathophysiology, and clinical presentation have shed new light on this disorder. This paper synthesizes the current knowledge on FND, focusing on its epidemiology and underlying mechanisms, neuroimaging insights, and the differentiation of FND from feigning or malingering. This review highlights the phenotypic heterogeneity of FND and the diagnostic challenges it presents. It also discusses the significant role of neuroimaging in unraveling the complex neural underpinnings of FND and its potential in predicting treatment response. This paper underscores the importance of a nuanced understanding of FND in informing clinical practice and guiding future research. With advancements in neuroimaging techniques and growing recognition of the disorder's multifaceted nature, the paper suggests a promising trajectory toward more effective, personalized treatment strategies and a better overall understanding of the disorder.
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Affiliation(s)
- Ioannis Mavroudis
- Department of Neuroscience, Leeds Teaching Hospitals, NHS Trust, Leeds LS2 9JT, UK;
- Faculty of Medicine, Leeds University, Leeds LS2 9JT, UK
| | - Dimitrios Kazis
- Third Department of Neurology, Aristotle University of Thessaloniki, 541 24 Thessaloniki, Greece;
| | - Fatima Zahra Kamal
- Higher Institute of Nursing Professions and Health Technical (ISPITS), Marrakech 40000, Morocco
- Laboratory of Physical Chemistry of Processes and Materials, Faculty of Sciences and Techniques, Hassan First University, Settat 26000, Morocco
| | - Irina-Luciana Gurzu
- Faculty of Medicine, University of Medicine and Pharmacy “Grigore T. Popa”, 700115 Iasi, Romania (A.I.)
| | - Alin Ciobica
- Department of Biology, Faculty of Biology, Alexandru Ioan Cuza University of Iasi, Carol I Avenue 20th A, 700505 Iasi, Romania
- Center of Biomedical Research, Romanian Academy, Iasi Branch, Teodor Codrescu 2, 700481 Iasi, Romania
- Academy of Romanian Scientists, 3 Ilfov, 050044 Bucharest, Romania
- Preclinical Department, Apollonia University, Păcurari Street 11, 700511 Iasi, Romania
| | - Manuela Pădurariu
- “Socola” Institute of Psychiatry, Șoseaua Bucium 36, 700282 Iasi, Romania;
| | - Bogdan Novac
- Faculty of Medicine, University of Medicine and Pharmacy “Grigore T. Popa”, 700115 Iasi, Romania (A.I.)
| | - Alin Iordache
- Faculty of Medicine, University of Medicine and Pharmacy “Grigore T. Popa”, 700115 Iasi, Romania (A.I.)
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Maxwell A, Zouki JJ, Eapen V. Integrated cognitive behavioral intervention for functional tics (I-CBiT): case reports and treatment formulation. Front Pediatr 2023; 11:1265123. [PMID: 38034832 PMCID: PMC10687404 DOI: 10.3389/fped.2023.1265123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Accepted: 10/30/2023] [Indexed: 12/02/2023] Open
Abstract
Introduction The onset of the COVID-19 pandemic saw a global surge in functional tic-like behaviors (FTLBs). FTLBs are unique from primary tic disorders. They are thought to manifest through a complex interplay between environmental and personal factors, including the stress-arousal system, and are characterized by their sudden and explosive onset. Accordingly, common interventions for tic disorders show limited efficacy in this population. We present an Integrated Cognitive Behavioral Intervention for Functional Tics (I-CBiT) that uses an urge acceptance model to manage tics and related stress and anxiety. Methods We describe the treatment outcomes of eight young people presenting with new and sudden onset FTLBs who underwent I-CBiT, which integrates traditional behavioral tic interventions with third-wave cognitive behavioral therapies. All cases completed the three-phase intervention involving core components of psychoeducation, exposure and response prevention with urge acceptance, sensory grounding strategies, and cognitive behavioral intervention targeting the stress-arousal system. Tic severity and impairment were assessed prior to treatment and at completion. Results All cases showed a significant reduction in tic severity post I-CBiT and an improvement in overall daily living function. These cases highlight the role of urge acceptance in managing both tic urges and the underlying stress-arousal system to bring about long-term change. Conclusion We demonstrated the efficacy of I-CBiT for managing FTLBs. Our findings illustrate the importance of treating underlying stress and anxiety in this population and, therefore, a need for greater interaction between multidisciplinary services in managing FTLBs to comprehensively cover the varied symptom presentations linked to thoughts, emotions, bodily sensations, and stress responses.
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Affiliation(s)
- Amanda Maxwell
- Discipline of Psychiatry and Mental Health, UNSW School of Clinical Medicine, University of New South Wales, Kensington, NSW, Australia
| | - Jade-Jocelyne Zouki
- Centre for Social and Early Emotional Development and School of Psychology, Deakin University, Geelong, VIC, Australia
| | - Valsamma Eapen
- Discipline of Psychiatry and Mental Health, UNSW School of Clinical Medicine, University of New South Wales, Kensington, NSW, Australia
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Mavroudis I, Chatzikonstantinou S, Petridis F, Palade OD, Ciobica A, Balmus IM. Functional Overlay Model of Persistent Post-Concussion Syndrome. Brain Sci 2023; 13:1028. [PMID: 37508960 PMCID: PMC10377031 DOI: 10.3390/brainsci13071028] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 06/28/2023] [Accepted: 07/02/2023] [Indexed: 07/30/2023] Open
Abstract
Persistent post-concussion syndrome (PPCS) is a complex and debilitating condition that can develop after head concussions or mild traumatic brain injury (mTBI). PPCS is characterized by a wide range of symptoms, including headaches, dizziness, fatigue, cognitive deficits, and emotional changes, that can persist for months or even years after the initial injury. Despite extensive research, the underlying mechanisms of PPCS are still poorly understood; furthermore, there are limited resources to predict PPCS development in mTBI patients and no established treatment. Similar to PPCS, the etiology and pathogenesis of functional neurological disorders (FNDs) are not clear neither fully described. Nonspecific multifactorial interactions that were also seen in PPCS have been identified as possible predispositions for FND onset and progression. Thus, we aimed to describe a functional overlay model of PPCS that emphasizes the interplay between functional and structural factors in the development and perpetuation of PPCS symptoms. Our model suggests that the initial brain injury triggers a cascade of physiological and psychological processes that disrupt the normal functioning of the brain leading to persistent symptoms. This disruption can be compounded by pre-existing factors, such as genetics, prior injury, and psychological distress, which can increase the vulnerability to PPCS. Moreover, specific interventions, such as cognitive behavioral therapy, neurofeedback, and physical exercise can target the PPCS treatment approach. Thus, the functional overlay model of PPCS provides a new framework for understanding the complex nature of this condition and for developing more effective treatments. By identifying and targeting specific functional factors that contribute to PPCS symptoms, clinicians and researchers can improve the diagnosis, management, and ultimately, outcomes of patients with this condition.
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Affiliation(s)
- Ioannis Mavroudis
- Department of Neuroscience, Leeds Teaching Hospitals, Leeds LS2 9JT, UK
- Faculty of Medicine, Leeds University, Leeds LS2 9JT, UK
| | | | - Foivos Petridis
- Third Department of Neurology, Aristotle University of Thessaloniki, 541 24 Thessaloniki, Greece
| | - Octavian Dragos Palade
- Surgical Department, Faculty of Medicine, University of Medicine and Pharmacy "Grigore T. Popa", 700115 Iasi, Romania
| | - Alin Ciobica
- Department of Biology, Faculty of Biology, Alexandru Ioan Cuza University of Iasi, 20th Carol I Avenue, 700506 Iasi, Romania
- Centre of Biomedical Research, Romanian Academy, B dul Carol I, No. 8, 700506 Iasi, Romania
- Academy of Romanian Scientists, Splaiul Independentei nr. 54, Sector 5, 050094 Bucuresti, Romania
| | - Ioana-Miruna Balmus
- Department of Exact Sciences and Natural Sciences, Institute of Interdisciplinary Research, "Alexandru Ioan Cuza" University of Iasi, Alexandru Lapusneanu Street, No. 26, 700057 Iasi, Romania
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Othman A, Cecchini A, Eftaiha A, Nwosisi N, Pierce D. Functional Neurological Symptom Disorder (FND) Leading to the Development of Deep Vein Thrombosis (DVT). Cureus 2022; 14:e26378. [PMID: 35911352 PMCID: PMC9336865 DOI: 10.7759/cureus.26378] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/27/2022] [Indexed: 11/05/2022] Open
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Jungilligens J, Paredes-Echeverri S, Popkirov S, Barrett LF, Perez DL. A new science of emotion: implications for functional neurological disorder. Brain 2022; 145:2648-2663. [PMID: 35653495 PMCID: PMC9905015 DOI: 10.1093/brain/awac204] [Citation(s) in RCA: 45] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Revised: 04/28/2022] [Accepted: 05/20/2022] [Indexed: 01/11/2023] Open
Abstract
Functional neurological disorder reflects impairments in brain networks leading to distressing motor, sensory and/or cognitive symptoms that demonstrate positive clinical signs on examination incongruent with other conditions. A central issue in historical and contemporary formulations of functional neurological disorder has been the mechanistic and aetiological role of emotions. However, the debate has mostly omitted fundamental questions about the nature of emotions in the first place. In this perspective article, we first outline a set of relevant working principles of the brain (e.g. allostasis, predictive processing, interoception and affect), followed by a focused review of the theory of constructed emotion to introduce a new understanding of what emotions are. Building on this theoretical framework, we formulate how altered emotion category construction can be an integral component of the pathophysiology of functional neurological disorder and related functional somatic symptoms. In doing so, we address several themes for the functional neurological disorder field including: (i) how energy regulation and the process of emotion category construction relate to symptom generation, including revisiting alexithymia, 'panic attack without panic', dissociation, insecure attachment and the influential role of life experiences; (ii) re-interpret select neurobiological research findings in functional neurological disorder cohorts through the lens of the theory of constructed emotion to illustrate its potential mechanistic relevance; and (iii) discuss therapeutic implications. While we continue to support that functional neurological disorder is mechanistically and aetiologically heterogenous, consideration of how the theory of constructed emotion relates to the generation and maintenance of functional neurological and functional somatic symptoms offers an integrated viewpoint that cuts across neurology, psychiatry, psychology and cognitive-affective neuroscience.
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Affiliation(s)
- Johannes Jungilligens
- Correspondence to: Johannes Jungilligens University Hospital Knappschaftskrankenhaus Bochum Department of Neurology In der Schornau 23-25 44892 Bochum, Germany E-mail:
| | | | - Stoyan Popkirov
- Department of Neurology, University Hospital Knappschaftskrankenhaus Bochum, Ruhr University Bochum, Bochum, Germany
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Utianski RL, Duffy JR. Understanding, Recognizing, and Managing Functional Speech Disorders: Current Thinking Illustrated With a Case Series. Am J Speech Lang Pathol 2022; 31:1205-1220. [PMID: 35290099 DOI: 10.1044/2021_ajslp-21-00366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
PURPOSE Functional speech disorders (FSDs), a subtype of functional neurological disorders, are distinguishable from neurogenic motor speech disorders based on their clinical features, clinical course, and response to treatment. However, their differential diagnosis and management can be challenging. FSDs are not well understood, but growing evidence suggests a biopsychosocial basis distinct from structural lesions that cause neurogenic motor speech disorders. METHOD AND RESULTS Following an overview of FSDs, four patients are described to illustrate the range of clinical manifestations, biopsychosocial contexts, and responses to treatment of FSDs. The path to differential diagnosis is discussed, with particular attention to positive features that led to the FSD diagnosis. Approaches to education, counseling, and management are discussed. CONCLUSIONS This case series demonstrates that FSDs can present with a variety of manifestations including dysfluencies, articulation errors, dysphonia, rate and prosodic abnormalities, and combinations of disruptions in speech subsystems. FSDs may present in the context of known recent or remote physical or psychosocial trauma or, as in many cases, in the absence of an identifiable triggering event. FSDs are recognizable by positive clinical features and should not be considered a diagnosis of exclusion. With appropriate identification, counseling, and treatment, FSDs may resolve, sometimes rapidly; in some cases, treatment may be prolonged or ineffective.
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Brunner R, Jägle H, Kandsperger S. Dissociative Visual Loss in Children and Adolescents. Klin Monbl Augenheilkd 2021; 238:1084-1091. [PMID: 34662923 DOI: 10.1055/a-1617-3193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Psychogenic vision disorders in children and adolescents are a common disorder primarily encountered by ophthalmologists at the onset because, as with other disorders of dissociation, the presentation suggests a neurologic or other somatic condition. Loss of visual acuity, blurred vision and visual field restriction-often described as tunnel vision-appears to be typical. The onset may be sudden, frequently related to a wide range of stressful life events (school failure, family conflicts, accidents). While the majority of these children quickly recover from their symptoms, a substantial percentage experience persistent symptoms or a fluctuating course. Due to the lack of efficacy studies of specific treatment protocols, diagnostic work-up and treatment suffer from a high degree of uncertainty. Differentiating dissociative visual loss from physical illness requires special expertise. The uncertainty of ophthalmologists and the other specialists involved in dealing with this clinical condition often delays the specialised treatment and may also trigger inadequate therapy with the iatrogenic risk of harming the patient. This article primarily describes the disorder-specific psychiatric diagnostic as well as the somatic differential diagnostic work-up and outlines the therapeutic principles of dissociative visual loss.
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Affiliation(s)
- Romuald Brunner
- Klinik und Poliklinik für Kinder- und Jugendpsychiatrie, Psychosomatik und Psychotherapie, Universität Regensburg, Deutschland
| | - Herbert Jägle
- Klinik und Poliklinik für Augenheilkunde, Universitätsklinikum Regensburg, Deutschland
| | - Stephanie Kandsperger
- Klinik und Poliklinik für Kinder- und Jugendpsychiatrie, Psychosomatik und Psychotherapie, Universität Regensburg, Deutschland
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Ercoli T, Defazio G, Geroin C, Marcuzzo E, Fabbrini G, Bono F, Mechelli A, Ceravolo R, Romito LM, Albanese A, Pisani A, Zibetti M, Altavista MC, Maderna L, Petracca M, Girlanda P, Mascia MM, Berardelli A, Tinazzi M. Sudden Onset, Fixed Dystonia and Acute Peripheral Trauma as Diagnostic Clues for Functional Dystonia. Mov Disord Clin Pract 2021; 8:1107-1111. [PMID: 34631946 PMCID: PMC8485608 DOI: 10.1002/mdc3.13322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2021] [Revised: 07/16/2021] [Accepted: 07/26/2021] [Indexed: 11/18/2022] Open
Abstract
Background The differentiation of functional dystonia from idiopathic dystonia may be clinically challenging. Objective To identify clinical features suggestive of functional dystonia to guide physicians to distinguish functional dystonia from idiopathic dystonia. Methods Patient data were extracted from the Italian Registry of Functional Motor Disorders and the Italian Registry of Adult Dystonia. Patients with functional and idiopathic dystonia were followed up at the same clinical sites, and they were similar in age and sex. Results We identified 113 patients with functional dystonia and 125 with idiopathic dystonia. Sudden onset of dystonia, evidence of fixed dystonia, and acute peripheral trauma before dystonia onset were more frequent in the functional dystonia group. No study variable alone achieved satisfactory sensitivity and specificity, whereas a combination of variables yielded 85% sensitivity and 98% specificity. A diagnostic algorithm was developed to reduce the risk of misclassifying functional dystonia. Conclusion Our findings extend the current diagnostic approach to functional dystonia by showing that clinical information about symptom onset, fixed dystonia, and history of peripheral trauma may provide key clues in the diagnosis of functional dystonia.
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Affiliation(s)
- Tommaso Ercoli
- Department of Medical Sciences and Public Health University of Cagliari Cagliari Italy
| | - Giovanni Defazio
- Department of Medical Sciences and Public Health University of Cagliari Cagliari Italy
| | - Christian Geroin
- Neurology Unit, Movement Disorders Division, Department of Neurosciences, Biomedicine and Movement Sciences University of Verona Verona Italy
| | - Enrico Marcuzzo
- Neurology Unit, Movement Disorders Division, Department of Neurosciences, Biomedicine and Movement Sciences University of Verona Verona Italy
| | - Giovanni Fabbrini
- Department of Human Neurosciences Sapienza University of Rome Rome Italy.,IRCCS Neuromed Pozzilli Italy
| | - Francesco Bono
- Botulinum Toxin Center, Neurology Unit A.O.U. Mater Domini Catanzaro Italy
| | | | - Roberto Ceravolo
- Neurology Unit, Department of Clinical and Experimental Medicine University of Pisa Pisa Italy
| | - Luigi Michele Romito
- Parkinson and Movement Disorders Unit Fondazione IRCCS Istituto Neurologico Carlo Besta Milan Italy
| | - Alberto Albanese
- Department of Neurology IRCCS Humanitas Research Hospital Rozzano Italy
| | - Antonio Pisani
- Department of Brain and Behavioral Sciences University of Pavia Pavia Italy.,IRCCS Mondino Foundation Pavia Italy
| | - Maurizio Zibetti
- Department of Neuroscience-Rita Levi Montalcini University of Turin Turin Italy
| | | | - Luca Maderna
- Department of Neurology-Stroke Unit and Laboratory of Neurosciences Istituto Auxologico Italiano, IRCCS Milan Italy
| | - Martina Petracca
- Fondazione Policlinico Universitario 'Agostino Gemelli'-IRCCS Rome Italy
| | - Paolo Girlanda
- Department of Clinical and Experimental Medicine University of Messina Messina Italy
| | - Marcello Mario Mascia
- Department of Medical Sciences and Public Health University of Cagliari Cagliari Italy
| | - Alfredo Berardelli
- Department of Human Neurosciences Sapienza University of Rome Rome Italy.,IRCCS Neuromed Pozzilli Italy
| | - Michele Tinazzi
- Neurology Unit, Movement Disorders Division, Department of Neurosciences, Biomedicine and Movement Sciences University of Verona Verona Italy
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Frucht L, Perez DL, Callahan J, MacLean J, Song PC, Sharma N, Stephen CD. Functional Dystonia: Differentiation From Primary Dystonia and Multidisciplinary Treatments. Front Neurol 2021; 11:605262. [PMID: 33613415 PMCID: PMC7894256 DOI: 10.3389/fneur.2020.605262] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Accepted: 12/31/2020] [Indexed: 12/12/2022] Open
Abstract
Dystonia is a common movement disorder, involving sustained muscle contractions, often resulting in twisting and repetitive movements and abnormal postures. Dystonia may be primary, as the sole feature (isolated) or in combination with other movement disorders (combined dystonia), or as one feature of another neurological process (secondary dystonia). The current hypothesis is that dystonia is a disorder of distributed brain networks, including the basal ganglia, cerebellum, thalamus and the cortex resulting in abnormal neural motor programs. In comparison, functional dystonia (FD) may resemble other forms of dystonia (OD) but has a different pathophysiology, as a subtype of functional movement disorders (FMD). FD is the second most common FMD and amongst the most diagnostically challenging FMD subtypes. Therefore, distinguishing between FD and OD is important, as the management of these disorders is distinct. There are also different pathophysiological underpinnings in FD, with for example evidence of involvement of the right temporoparietal junction in functional movement disorders that is believed to serve as a general comparator of internal predictions/motor intentions with actual motor events resulting in disturbances in self-agency. In this article, we present a comprehensive review across the spectrum of FD, including oromandibular and vocal forms and discuss the history, clinical clues, evidence for adjunctive "laboratory-based" testing, pathophysiological research and prognosis data. We also provide the approach used at the Massachusetts General Hospital Dystonia Center toward the diagnosis, management and treatment of FD. A multidisciplinary approach, including neurology, psychiatry, physical, occupational therapy and speech therapy, and cognitive behavioral psychotherapy approaches are frequently required; pharmacological approaches, including possible targeted use of botulinum toxin injections and inpatient programs are considerations in some patients. Early diagnosis and treatment may help prevent unnecessary investigations and procedures, while facilitating the appropriate management of these highly complex patients, which may help to mitigate frequently poor clinical outcomes.
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Affiliation(s)
- Lucy Frucht
- Faculty of Arts and Sciences, Harvard University, Boston, MA, United States
| | - David L. Perez
- Cognitive Behavioral Neurology Unit, Department of Neurology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, United States
- Functional Neurological Disorder Research Program, Department of Neurology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, United States
- Neuropsychiatry Division, Department of Psychiatry, Massachusetts General Hospital and Harvard Medical School, Boston, MA, United States
| | - Janet Callahan
- MGH Institute of Healthcare Professionals, Massachusetts General Hospital and Harvard Medical School, Boston, MA, United States
| | - Julie MacLean
- Occupational Therapy Department, Massachusetts General Hospital and Harvard Medical School, Boston, MA, United States
| | - Phillip C. Song
- Department of Otolaryngology, Massachusetts Eye and Ear Infirmary, Harvard Medical School, Boston, MA, United States
| | - Nutan Sharma
- Functional Neurological Disorder Research Program, Department of Neurology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, United States
- Dystonia Center and Movement Disorders Unit, Department of Neurology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, United States
| | - Christopher D. Stephen
- Functional Neurological Disorder Research Program, Department of Neurology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, United States
- Dystonia Center and Movement Disorders Unit, Department of Neurology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, United States
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Abstract
Stroke services have been reconfigured in recent years to facilitate early intervention. Throughout stroke settings, some patients present with functional symptoms that cannot be attributed to a structural cause. Emphasis on fast diagnosis and treatment means that a proportion of patients entering the care pathway present with functional symptoms that mimic stroke or have functional symptoms in addition to vascular stroke. There is limited understanding of mechanisms underlying functional stroke symptoms, how the treatment of such patients should be managed, and no referral pathway or treatment. Predisposing factors vary between individuals, and symptoms are heterogeneous: onset can be acute or insidious, and duration can be short-lived or chronic in the context of new or recurrent illness cognitions and behaviors. This article proposes a conceptual model of functional symptoms identified in stroke services and some hypotheses based on a narrative review of the functional neurological disorder literature. Predisposing factors may include illness experiences, stressors, and chronic autonomic nervous system arousal. Following the onset of distressing symptoms, perpetuating factors may include implicit cognitive processes, classical and operant conditioning, illness beliefs, and behavioral responses, which could form the basis of treatment targets. The proposed model will inform the development of theory-based interventions as well as a functional stroke care pathway.
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Affiliation(s)
- Abbeygail Jones
- The Department of Psychological Medicine, King's College London (Jones, Chalder); the Institute of Population Health, Trinity College Dublin (O'Connell); and the Institute of Mental Health, University College London (David)
| | - Nicola O'Connell
- The Department of Psychological Medicine, King's College London (Jones, Chalder); the Institute of Population Health, Trinity College Dublin (O'Connell); and the Institute of Mental Health, University College London (David)
| | - Anthony S David
- The Department of Psychological Medicine, King's College London (Jones, Chalder); the Institute of Population Health, Trinity College Dublin (O'Connell); and the Institute of Mental Health, University College London (David)
| | - Trudie Chalder
- The Department of Psychological Medicine, King's College London (Jones, Chalder); the Institute of Population Health, Trinity College Dublin (O'Connell); and the Institute of Mental Health, University College London (David)
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Barnett C, Davis R, Mitchell C, Tyson S. The vicious cycle of functional neurological disorders: a synthesis of healthcare professionals’ views on working with patients with functional neurological disorder. Disabil Rehabil 2020; 44:1802-1811. [DOI: 10.1080/09638288.2020.1822935] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Caroline Barnett
- University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK
| | | | - Claire Mitchell
- Division of Human Communication, Development & Hearing, University of Manchester, Manchester, UK
| | - Sarah Tyson
- Division of Nursing, Midwifery & Social Work, University of Manchester, Manchester, UK
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Fettig M, El-Hage W, Klemina I, Biberon J, de Toffol B, Thiriaux A, Visseaux JF, Lemesle Martin M, Schwan R, Bechiri F, Cohn A, Meyer M, Maillard L, Hingray C. Adherence to mental health care and caregiver-patient relationship after diagnosis of psychogenic non-epileptic seizures: Longitudinal follow-up study. Seizure 2020; 80:227-33. [PMID: 32659654 DOI: 10.1016/j.seizure.2020.06.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 05/21/2020] [Accepted: 06/01/2020] [Indexed: 11/21/2022] Open
Abstract
PURPOSE This study aimed to describe the quality of adherence to mental health care follow-up and the mental health caregiver-patient relationship after diagnosis of psychogenic non-epileptic seizures (PNES). METHODS We conducted an ancillary study of a multicenter prospective study. Patients (n = 108) received a standardized diagnostic explanation of PNES following video-EEG. They were referred to their community mental health centers or to a private psychiatrist/psychologist, who received written information about PNES and the study. Data collected about adherence to care (follow-up started or not, consensual and those who withdrew non-consensually, ongoing follow-up) were cross-tabulated from patients and care structures by telephone at 6, 12, 18 and 24 months after diagnosis. At M24, we collected reasons for stopping follow-up by phone using a predefined 9-item questionnaire. We also assessed the perception of the caregiver-patient relationship among patients who started follow-up and their mental health caregivers with a simple questionnaire based on five dimensions: feeling comfortable, continuity of care, content of therapy sessions, effectiveness of therapy sessions, and the patient's overall assessment of the follow-up. RESULTS From M6 to M24, ongoing follow-up decreased from 64.8 to 25.8%, while the "not following initial recommandations" group of patients (those who never started follow-up and those who withdrew non-consensually) increased from 35.2 to 64.9%. We found two main reasons for stopping follow-up: lack of interest and feeling better. Adherent patients had an overall more positive view of their therapy than caregivers. CONCLUSION Only a third of PNES patients adhered to a mental health care program and felt comfortable in the caregiver-patient relationship. Solutions need to be found to help patients understand the interest of follow-up therapy and help mental health caregivers improve their feeling of competence.
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Joos A, Halmer R, Leiprecht N, Schörner K, Lahmann C, Blahak C. [Functional neurological disorders: update and example of integrated inpatient treatment including mirror therapy]. Nervenarzt 2020; 91:252-256. [PMID: 31690969 DOI: 10.1007/s00115-019-00827-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Affiliation(s)
- A Joos
- Zentrum für Psychische Erkrankungen, Klinik für Psychosomatische Medizin und Psychotherapie, Universitätsklinikum Freiburg, Medizinische Fakultät, Universität Freiburg, Freiburg, Deutschland.
- Psychotherapeutische Neurologie, Kliniken Schmieder, Gailingen, Deutschland.
| | - R Halmer
- Psychotherapeutische Neurologie, Kliniken Schmieder, Gailingen, Deutschland
| | - N Leiprecht
- Psychotherapeutische Neurologie, Kliniken Schmieder, Gailingen, Deutschland
| | - K Schörner
- Psychotherapeutische Neurologie, Kliniken Schmieder, Gailingen, Deutschland
| | - C Lahmann
- Zentrum für Psychische Erkrankungen, Klinik für Psychosomatische Medizin und Psychotherapie, Universitätsklinikum Freiburg, Medizinische Fakultät, Universität Freiburg, Freiburg, Deutschland
| | - C Blahak
- Klinik für Neurologie und Neurogeriatrie, Ortenau-Klinikum Lahr-Ettenheim, Lahr, Deutschland
- Neurologische Klinik, UniversitätsMedizin Mannheim, Universität Heidelberg, Mannheim, Deutschland
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Barnett C, Armes J, Smith C. Speech, language and swallowing impairments in functional neurological disorder: a scoping review. Int J Lang Commun Disord 2019; 54:309-320. [PMID: 30592118 DOI: 10.1111/1460-6984.12448] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Revised: 11/27/2018] [Accepted: 12/04/2018] [Indexed: 06/09/2023]
Abstract
BACKGROUND Functional neurological disorder (FND) is common across healthcare settings. The Diagnostic and Statistical Manual of Mental Disorders states that speech and swallowing symptoms can be present in FND. Despite this, there is a dearth of guidelines for speech and language therapists (SLTs) for this client group. AIMS To address the following question in order to identify gaps for further research: What is known about speech, language and swallowing symptoms in patients with FND? METHODS & PROCEDURES A scoping review was conducted. Six healthcare databases were searched for relevant literature: CINAHL PLUS, MEDLINE, ProQuest Nursing and Allied Health Professionals, Science Citation Index, Scopus, and PsychINFO. The following symptoms were excluded from the review: dysphonia, globus pharyngeus, dysfluency, foreign accent syndrome and oesophageal dysphagia. MAIN CONTRIBUTION A total of 63 papers were included in the final review; they ranged in date from 1953 to 2018. Case studies were the most frequent research method (n = 23, 37%). 'Psychogenic' was the term used most frequently (n = 24, 38%), followed by 'functional' (n = 21, 33%). Speech symptoms were reported most frequently (n = 41, 65%), followed by language impairments (n = 35, 56%) and dysphagia (n = 13, 21%). Only 11 publications comment on the involvement of SLTs. Eight papers report direct speech and language therapy input; however, none studied the effectiveness of speech and language therapy. CONCLUSIONS & IMPLICATIONS Speech, language and swallowing symptoms do occur in patients with FND, yet it is a highly under-researched area. Further research is required to create a set of positive diagnostic criteria, gather accurate data on numbers of patients with FND and speech, language or swallowing symptoms, and to evaluate the effectiveness of direct speech and language therapy involvement.
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Affiliation(s)
- Caroline Barnett
- University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK
| | - Jean Armes
- Birmingham Community Healthcare NHS Trust, Birmingham, UK
| | - Christina Smith
- Department of Language and Cognition, University College London, London, UK
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Bolton C, Goldsmith P. Complaints from patients with functional neurological disorders: a cross-sectional UK survey of why patients complain and the effect on the clinicians who look after them. BMJ Open 2018; 8:e021573. [PMID: 30413498 PMCID: PMC6231557 DOI: 10.1136/bmjopen-2018-021573] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/04/2022] Open
Abstract
OBJECTIVE To evaluate the nature of complaints from patients with functional neurological disorders and understand the reaction of UK neurology consultants to receiving complaints from this patient group. METHODS A voluntary online retrospective survey was advertised to UK consultant neurologists. Questions asked about the nature of the complaint, how it was dealt with, how it affected their emotional well-being and attitude to work, and whether it influenced their clinical practice. Responses were anonymised. The frequency of responses and percentage of total responses were analysed. Respondents were also given opportunities to add personal comments. RESULTS Responses from 58 clinicians were received. Patient disagreement with the diagnosis was a factor in 90% of complaints received. Only 77% of complaints were resolved within 6 months and 61% of clinicians received no feedback about the outcome. 31% of clinicians reported their most problematic complaint had an adverse effect on their mood. 67% of respondents changed their practice following the complaint with 59% investigating more frequently or due to perceived pressure from patients. CONCLUSIONS Complaints from patients with functional neurological disorders appear to be primarily due to disagreement with the diagnosis. They are more difficult to resolve than other complaints, and clinicians who deal with them often become the 'second victim' in the process leading to potentially adverse effects on patient care. Strategies to tackle these issues are discussed.
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Affiliation(s)
- Clare Bolton
- Neurology Department, James Cook University Hospital, Middlesbrough, UK
| | - Paul Goldsmith
- Neurology Department, Royal Victoria Infirmary, Newcastle upon Tyne, UK
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16
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Nham B, Williard A. Why medically unexplained symptoms and health anxiety don't need to make your heart sink. Med J Aust 2018; 208:188. [DOI: 10.5694/mja17.00670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Accepted: 07/20/2017] [Indexed: 11/17/2022]
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Walsh KE, Baneck T, Page RL, Brignole M, Hamdan MH. Psychogenic pseudosyncope: Not always a diagnosis of exclusion. Pacing Clin Electrophysiol 2018; 41:480-486. [PMID: 29478246 DOI: 10.1111/pace.13316] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2017] [Revised: 01/18/2018] [Accepted: 01/31/2018] [Indexed: 01/29/2023]
Abstract
BACKGROUND Psychogenic pseudosyncope (PPS) frequently mimics syncope. The aim of this study was to assess the prevalence and clinical features of PPS and its relationship to vasovagal syncope (VVS). METHODS We examined retrospectively the medical records of 1,401 consecutive patients referred to a syncope unit. We identified patients who had the final diagnosis of PPS. In these patients, we retrieved the initial diagnosis made during their first visit and the subsequent tests performed leading to the final diagnosis. RESULTS Fourteen (1.0%) patients (mean age 35 ± 14; 11 females) were diagnosed as having PPS: seven had a diagnosis of PPS alone and seven had both VVS and PPS. High frequency of attacks (53 ± 35 attacks during the previous year), prolonged loss of consciousness (minutes to > 1 hour), and a history of psychiatric disorders characterized PPS patients. Tilt test reproduced a PPS attack in the presence of normal blood pressure and heart rate in seven patients (50%), and induced VVS in another three patients who had the final diagnosis of both PPS and VVS. In two patients, one or more events occurred during the clinic visits and were directly witnessed by the clinic personnel. CONCLUSIONS We have shown that 1% of referrals to a syncope unit have the final diagnosis of PPS and that up to 50% of cases presented with a different initial diagnosis, namely VVS. Our findings suggest that causality between syncope and psychiatric disorders is likely bidirectional. The presence of a multidisciplinary team is important to address this often unrecognized relationship.
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Affiliation(s)
- Kathleen E Walsh
- Division of Cardiovascular Medicine, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Trisha Baneck
- Division of Cardiovascular Medicine, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Richard L Page
- Division of Cardiovascular Medicine, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Michele Brignole
- Division of Cardiovascular Medicine, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA.,Department of Cardiology, Arrhythmologic Centre, Ospedali del Tigullio, Lavagna, Genoa, Italy
| | - Mohamed H Hamdan
- Division of Cardiovascular Medicine, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
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Abstract
SummaryThe focus of this article is the assessment and management of medically unexplained (‘psychogenic’) amnesia, which we classify here as global or situation specific. Other psychiatric causes for memory disorder and neurological conditions that could cause diagnostic confusion are briefly reviewed, as are forensic aspects of memory complaints. Finally, brain and physiological mechanisms potentially associated with psychogenic amnesia are discussed.
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Abstract
Functional somatic syndrome (FSS) occurs in as many as 30% of patients in general medical practice, but it is infrequently a topic of formal instruction. Many physicians feel uncomfortable with medically unexplained symptoms and are unfamiliar with how to assess or manage them. Traditional medical approaches can be ineffective and can contribute to iatrogenic or adverse physiologic effects in patients. Physicians treating patients with FSS should not only consider standard medical tests, but they should also try to gain a deeper behavioral understanding of the mind-body connections that underlie the presenting symptoms. Osteopathic physicians, with their emphasis on holistic patient care, are in a key position to treat patients with FSS. This review provides a brief recapitulation of the literature and illustrates key factors in the assessment and management of FSS.
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Pleizier M, de Haan RJ, Vermeulen M. Management of patients with functional neurological symptoms: a single-centre randomised controlled trial. J Neurol Neurosurg Psychiatry 2017; 88:430-436. [PMID: 28302865 DOI: 10.1136/jnnp-2015-312889] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/10/2015] [Revised: 02/22/2017] [Accepted: 02/28/2017] [Indexed: 11/03/2022]
Abstract
OBJECTIVE Is health-related quality of life 12 months after randomisation in participants with functional neurological symptoms better after discussion of the diagnosis by trained neurologists who schedule at least two follow-up visits (intervention group) than after the same discussion of the diagnosis by these neurologists and immediate referral to the general practitioner (control group)? METHODS A single-centre randomised controlled trial at one academic outpatient department of neurology. Participants were randomised 1:1, stratified for type of functional symptoms. The study sample consisted of 100 participants in the intervention group, and 95 participants in the control group. Primary outcome was the mean change 36-Item Short Form Health Survery (SF-36) scores from baseline to 12 months. RESULTS Participants in both treatment groups showed improvements on most SF-36 subscales and secondary outcomes measures but without significant between-group differences in mean change scores. Neither was there a difference between the treatment arms with regard to the number of participants who reported their symptoms at 12 months to have greatly improved compared with baseline: 29 participants (29/98=29.6%; two missing values) in the intervention group versus 31 participants (31/95=32.6%) in the control group (95% CI of the difference between proportions: from -16.1% to 10%). CONCLUSION This study showed that after a neurologist has established the diagnosis and briefly explained and thereafter has sent the patient to a neurologist with a special training who scheduled half an hour to discuss the diagnosis, more sessions by this neurologist do not improve outcome. CLINICAL TRIAL REGISTRATION NUMBER NTR 2570.
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Affiliation(s)
- Marc Pleizier
- Department of Neurology, Academic Medical Center, Amsterdam, The Netherlands
| | - Rob J de Haan
- Clinical Research Unit, Academic Medical Center, Amsterdam, The Netherlands
| | - Marinus Vermeulen
- Department of Neurology, Academic Medical Center, Amsterdam, The Netherlands
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Campbell KA, Madva EN, Villegas AC, Beale EE, Beach SR, Wasfy JH, Albanese AM, Huffman JC. Non-cardiac Chest Pain: A Review for the Consultation-Liaison Psychiatrist. Psychosomatics 2016; 58:252-265. [PMID: 28196622 DOI: 10.1016/j.psym.2016.12.003] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Revised: 12/05/2016] [Accepted: 12/07/2016] [Indexed: 12/16/2022]
Abstract
BACKGROUND Patients presenting with chest pain to general practice or emergency providers represent a unique challenge, as the differential is broad and varies widely in acuity. Importantly, most cases of chest pain in both acute and general practice settings are ultimately found to be non-cardiac in origin, and a substantial proportion of patients experiencing non-cardiac chest pain (NCCP) suffer significant disability. In light of emerging evidence that mental health providers can serve a key role in the care of patients with NCCP, knowledge of the differential diagnosis, psychiatric co-morbidities, and therapeutic techniques for NCCP would be of great use to both consultation-liaison (C-L) psychiatrists and other mental health providers. METHODS We reviewed prior published work on (1) the appropriate medical workup of the acute presentation of chest pain, (2) the relevant medical and psychiatric differential diagnosis for chest pain determined to be non-cardiac in origin, (3) the management of related conditions in psychosomatic medicine, and (4) management strategies for patients with NCCP. RESULTS We identified key differential diagnostic and therapeutic considerations for psychosomatic medicine providers in 3 different clinical contexts: acute care in the emergency department, inpatient C-L psychiatry, and outpatient C-L psychiatry. We also identified several gaps in the literature surrounding the short-term and long-term management of NCCP in patients with psychiatric etiologies or co-morbid psychiatric conditions. CONCLUSIONS Though some approaches to the care of patients with NCCP have been developed, more work is needed to determine the most effective management techniques for this unique and high-morbidity population.
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Affiliation(s)
- Kirsti A Campbell
- Harvard Medical School, Boston, MA; Department of Psychiatry, Massachusetts General Hospital, Boston, MA
| | - Elizabeth N Madva
- Harvard Medical School, Boston, MA; Department of Psychiatry, Massachusetts General Hospital, Boston, MA
| | - Ana C Villegas
- Department of Psychiatry, Massachusetts General Hospital, Boston, MA
| | - Eleanor E Beale
- Department of Psychiatry, Massachusetts General Hospital, Boston, MA
| | - Scott R Beach
- Harvard Medical School, Boston, MA; Department of Psychiatry, Massachusetts General Hospital, Boston, MA
| | - Jason H Wasfy
- Harvard Medical School, Boston, MA; Division of Cardiology, Department of Medicine, Massachusetts General Hospital, Boston, MA
| | - Ariana M Albanese
- Department of Psychiatry, Massachusetts General Hospital, Boston, MA
| | - Jeff C Huffman
- Harvard Medical School, Boston, MA; Department of Psychiatry, Massachusetts General Hospital, Boston, MA.
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22
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Ahmad O, Ahmad KE. Functional neurological disorders in outpatient practice: An Australian cohort. J Clin Neurosci 2016; 28:93-6. [DOI: 10.1016/j.jocn.2015.11.020] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2015] [Revised: 10/19/2015] [Accepted: 11/29/2015] [Indexed: 11/23/2022]
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Cho KJ, Lee NS, Lee YS, Jeong WJ, Suh HJ, Kim JC, Koh JS. The Changes of Psychometric Profiles after Medical Treatment of Lower Urinary Tract Symptoms Suggestive of Benign Prostatic Hyperplasia. Clin Psychopharmacol Neurosci 2015; 13:269-74. [PMID: 26598585 PMCID: PMC4662180 DOI: 10.9758/cpn.2015.13.3.269] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 03/30/2015] [Revised: 04/23/2015] [Accepted: 04/24/2015] [Indexed: 12/03/2022]
Abstract
Objective To investigate the relationship of somatization and depression with the degree of lower urinary tract symptoms suggestive of benign prostate hyperplasia (LUTS/BPH) and changes in psychometric profiles including somatization and depression after treatment of LUTS/BPH. Methods Subjects were evaluated at baseline and at week 12 following routine treatment for LUTS/BPH using the International Prostate Symptom Score (IPSS) to measure the severity of LUTS/BPH, the Overactive Bladder Symptom Score (OABSS) to measure the severity of OAB, the Patient Health Questionnaire-9 (PHQ-9) to assess depression, and the Patient Health Questionnaire-15 (PHQ-15) to evaluate somatization. The correlation of somatization and depression with the degree of LUTS/BPH symptoms at baseline and changes in somatization and depression after LUTS/BPH treatment were assessed using relevant statistical analyses. Results One hundred and twenty patients agreed to participate in this study, and 101 (84.2%) completed the 12-week trial and responded to the study questionnaires. At baseline, total IPSS score was correlated with PHQ-9 (r=0.475, p=0.005) and PHQ-15 (r=0.596, p<0.001) scores. The results after the 12-week treatment clearly show significant improvement in both PHQ-9 (p <0.001) and PHQ-15 (p=0.019) scores, and the PHQ-9 (r=0.509, p=0.048) and PHQ-15 (r=0.541, p=0.016) scores were positively correlated with total IPSS. Conclusion Our preliminary results indicated that severity of LUTS is correlated with severity of somatization and depression. Further, the improvement of LUTS after treatment may have positive impacts on somatization and depression.
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Affiliation(s)
- Kang Jun Cho
- Department of Urology, College of Medicine, The Catholic University of Korea
| | - Nam Suk Lee
- Department of Urology, College of Medicine, The Catholic University of Korea
| | - Yong Seok Lee
- Department of Urology, College of Medicine, The Catholic University of Korea
| | - Woon Jin Jeong
- Department of Psychiatry, Seoul Metropolitan Eunpyeong Hospital, Seoul, Korea
| | - Hong Jin Suh
- Department of Urology, College of Medicine, The Catholic University of Korea
| | - Joon Chul Kim
- Department of Urology, College of Medicine, The Catholic University of Korea
| | - Jun Sung Koh
- Department of Urology, College of Medicine, The Catholic University of Korea
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Evens A, Vendetta L, Krebs K, Herath P. Medically unexplained neurologic symptoms: a primer for physicians who make the initial encounter. Am J Med 2015; 128:1059-64. [PMID: 25910791 DOI: 10.1016/j.amjmed.2015.03.030] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/12/2015] [Revised: 03/17/2015] [Accepted: 03/18/2015] [Indexed: 12/13/2022]
Abstract
Medically unexplained symptoms are ubiquitous in clinical practice. Medical use costs of medically unexplained symptoms are projected at approximately $256 billion per year. When initially seen, these symptoms are often baffling, not only to the patients but also to the physicians who encounter them. Because of this, properly diagnosing them is seen generally as difficult at best, leading to massive overuse of unnecessary testing. Subsequently, their management can be cumbersome. All this burdens the patients with unnecessary costs, financially and emotionally. This primer discusses historical perspectives of these and the changing nomenclature, and outlines how to think about these complex symptoms and neurologic findings that will enable a positive diagnosis rather than a diagnosis of exclusion. We also offer useful heuristic principles of their management so that physician-patient relationships can be better maintained and the quality of life of these patients can be improved by way of some simple, economic approaches.
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Affiliation(s)
- Sirous Mobini
- Institute of Cognitive Neuroscience, University College London, London WC1N 3AR, UK
- Regional Neurological Rehabilitation Unit, Homerton University Hospital NHS Foundation Trust, London E9 6SR, UK
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van Hout M, Hageman G, van Valen E. Pitfalls in clinical assessment of neurotoxic diseases: Negative effects of repeated diagnostic evaluation, illustrated by a clinical case. Neurotoxicology 2014; 45:247-52. [DOI: 10.1016/j.neuro.2013.12.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2013] [Revised: 12/16/2013] [Accepted: 12/17/2013] [Indexed: 10/25/2022]
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Fahn S, Olanow CW. Reply to: Psychogenic movement disorders: What's in a name? Mov Disord 2014; 29:1699-701. [DOI: 10.1002/mds.26042] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2014] [Accepted: 08/24/2014] [Indexed: 11/06/2022] Open
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LaFaver K, Hallett M. Functional or psychogenic: what's the better name? Mov Disord 2014; 29:1698-9. [PMID: 25242623 DOI: 10.1002/mds.26035] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2014] [Revised: 06/10/2014] [Accepted: 08/24/2014] [Indexed: 11/06/2022] Open
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Noll-Hussong M, Holzapfel S, Pokorny D, Herberger S. Caloric vestibular stimulation as a treatment for conversion disorder: a case report and medical hypothesis. Front Psychiatry 2014; 5:63. [PMID: 24917828 PMCID: PMC4040883 DOI: 10.3389/fpsyt.2014.00063] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2014] [Accepted: 05/19/2014] [Indexed: 12/12/2022] Open
Abstract
Conversion disorder is a medical condition in which a person has paralysis, blindness, or other neurological symptoms that cannot be clearly explained physiologically. To date, there is neither specific nor conclusive treatment. In this paper, we draw together a number of disparate pieces of knowledge to propose a novel intervention to provide transient alleviation for this condition. As caloric vestibular stimulation has been demonstrated to modulate a variety of cognitive functions associated with brain activations, especially in the temporal-parietal cortex, anterior cingulate cortex, and insular cortex, there is evidence to assume an effect in specific mental disorders. Therefore, we go on to hypothesize that lateralized cold vestibular caloric stimulation will be effective in treating conversion disorder and we present provisional evidence from one patient that supports this conclusion. If our hypothesis is correct, this will be the first time in psychiatry and neurology that a clinically well-known mental disorder, long considered difficult to understand and to treat, is relieved by a simple or common, non-invasive medical procedure.
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Affiliation(s)
- Michael Noll-Hussong
- Klinik und Poliklinik fuer Psychosomatische Medizin und Psychotherapie des Universitaetsklinikums Ulm, Ulm, Germany
| | - Sabrina Holzapfel
- Hals-Nasen-Ohrenklinik und Poliklinik, Klinikum rechts der Isar, Technische Universitaet Muenchen, Muenchen, Germany
| | - Dan Pokorny
- Klinik und Poliklinik fuer Psychosomatische Medizin und Psychotherapie des Universitaetsklinikums Ulm, Ulm, Germany
| | - Simone Herberger
- Klinik fuer Psychosomatische Medizin und Psychotherapie des Klinikums Muenchen-Harlaching, Muenchen, Germany
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Affiliation(s)
- Stanley Fahn
- Department of Neurology, Columbia University Medical Center, New York, New York, USA
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Nunes J, Ventura T, Encarnação R, Pinto PR, Santos I. What do patients with medically unexplained physical symptoms (MUPS) think? A qualitative study. Ment Health Fam Med 2013; 10:67-79. [PMID: 24427173 PMCID: PMC3822638] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 04/25/2013] [Accepted: 06/01/2013] [Indexed: 06/03/2023]
Abstract
Context Medically unexplained physical symptoms (MUPS) are frequently encountered in family medicine, and lead to disability, discomfort, medicalisation, iatrogenesis and economic costs. They cause professionals to feel insecure and frustrated and patients to feel dissatisfied and misunderstood. Doctors seek answers for rather than with the patient. Objectives This study aimed to explore patients' explanations of the medically unexplained physical symptoms that they were experiencing by eliciting their own explanations for their complaints, their associated fears, their expectations of the consultation, changes in their ideas of causality, and the therapeutic approach that they considered would be useful. Methodology A qualitative analysis was under-taken of interviews with 15 patients with MUPS in a family medicine unit, 6 months after diagnosis. Results Experience is crucial in construction of the meaning of symptoms and illness behaviour. Many patients identify psychosocial causes under-lying their suffering. These patients received more medication and fewer requests for diagnostic examinations than they had expected. Normalisation is a common behaviour in the clinical approach. Normalisation without explanation can be effective if an effective therapeutic relationship exists that may dispense with the need for words. Listening is the procedure most valued by patients. Diagnostic tests may denote interest in patients' problems. The clinician's flexibility should allow adaptation to the patient's phases of acceptance of the significance of their physical, emotional and social problems. Conclusion Patients with MUPS have explanations and fears associated with their complaints. The patient comes to the consultation not because of the symptom, but because of what he or she thinks about the symptom. The therapeutic relationship, therapeutic listening, and flexibility should be the basis for approaching patients with MUPS. Patients do not always expect medication, although it is what they most often receive. Diagnostic tests, although used sparingly, can be a way to maintain and build a relationship. Drugs and tests can be a ritual statement of clinical interest in the patient and their symptoms.
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Affiliation(s)
- José Nunes
- Department of Family Medicine, Faculty of Medical Sciences, New University of Lisbon, Lisbon, Portugal
| | - Teresa Ventura
- Department of Family Medicine, Faculty of Medical Sciences, New University of Lisbon, Lisbon, Portugal
| | - Ricardo Encarnação
- Department of Mental Health, Faculty of Medical Sciences, New University of Lisbon, Lisbon, Portugal
| | - Patrícia Rosado Pinto
- Head of Medical Education Department, Faculty of Medical Sciences, New University of Lisbon, Lisbon, Portugal
| | - Isabel Santos
- Department of Family Medicine, Faculty of Medical Sciences, New University of Lisbon, Lisbon, Portugal
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Hirjak D, Thomann PA, Wolf RC, Weidner N, Wilder-Smith EP. Dissociative paraplegia after epidural anesthesia: a case report. J Med Case Rep 2013; 7:56. [PMID: 23445923 PMCID: PMC3610243 DOI: 10.1186/1752-1947-7-56] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2012] [Accepted: 01/16/2013] [Indexed: 11/29/2022] Open
Abstract
Introduction Clinicians are confronted with considerable difficulties in diagnosing conversion disorders such as dissociative paraplegia. In the literature, there is still no sufficient evidence regarding a typical pattern or general characteristics for this neuropsychiatric syndrome. Over the last decades case reports have described patients with similar personality traits, psychopathological characteristics, history and symptoms. Case presentation We present the case of a 67-year-old Caucasian woman of high economic status and educational level with no psychopathological symptoms and no history of mental disorders who developed dissociative paraplegia after epidural anesthesia. The neurological examination revealed incongruous features, and repeated spine magnetic resonance imaging was normal. Three years earlier the patient had transient paralysis of her left lower limb without detectable cause. Conclusion We identified an association between stressful life events and neurological anomalies. Crucial for the diagnosis of dissociative paraplegia is the neurological examination. Our case demonstrates that lack of psychopathological features and previous psychiatric diagnosis are not sufficient to exclude dissociative paraplegia. In patients with incongruous neurological findings and absent neurobiological correlates, clinicians should consider the presence of conversion disorders such as dissociative paraplegia.
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Affiliation(s)
- Dusan Hirjak
- Structural Neuroimaging Group, Department of General Psychiatry, Heidelberg University Hospital, Voßstraße 4, Heidelberg, D-69115, Germany.
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Affiliation(s)
- Venkateswaran Ramesh
- Department of Paediatric Neurology; Newcastle General Hospital; Newcastle upon Tyne; UK
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Abstract
A significant proportion of patients presenting to hyperacute stroke units (HSUs) are diagnosed with non-stroke (NS). This study aimed to assess the rate and diagnoses of NS patients admitted to a HSU and the implications for clinical service provision. Admissions to the HSU at the Southern General Hospital, Glasgow, were retrospectively assessed (March 2007-September 2007). NS patients were identified by two parallel ascertainment methods and NS diagnosis was confirmed by case-note and discharge letter review. Of 375 presentations, 116 (31%) were due to NS. NS diagnosis was more likely for local referrals than from regional hospitals (41% versus 19%; P = 0.0002). Compared with stroke/transient ischaemic attack patients, NS patients were significantly younger, more likely to have an magnetic resonance imaging (MRI) scan and had a shorter length of hospital stay. Common NS diagnoses were migraine (22%), functional neurological disorder (14%), syncope (12%) and seizure (6%). NS patients who had an MRI scan were more likely to have a length of stay ≥2 days (75% versus 53%; P = 0.03). NS makes up one-third of acute stroke-like presentations with a high frequency of neurological conditions. NS patients tend to be younger and require significant investigation. The increased use of MRI and neurological services has implications for providing a hyperacute stroke service.
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Affiliation(s)
- J M Reid
- Department of Neurology, Aberdeen Royal Infirmary, Aberdeen, Scotland, UK.
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Abstract
The etiopathology of somatoform disorders can only be understood against the background of an integrated biopsychosocial model. Cultural and historical influences must be taken into account as well as contemporary settings of scientific or medical priorities. In this context the emphasis on neurobiological findings can be interpreted as the non-accidental struggle for legitimacy of both patients and physicians. Altogether the available data on factors influencing the formation and maintenance of somatoform symptoms has to be described as both diverse and unspecific and thus points to a challenging research program in the coming years.
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Cortes E, Sahai A, Pontari M, Kelleher C. The psychology of LUTS: ICI-RS 2011. Neurourol Urodyn 2012; 31:340-3. [DOI: 10.1002/nau.22211] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2012] [Accepted: 01/12/2012] [Indexed: 12/18/2022]
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Clark MR. Psychiatry and chronic pain: Examining the interface and designing a structure for a patient-center approach to treatment. ACTA ACUST UNITED AC 2009; 3:95-100. [DOI: 10.1016/j.eujps.2009.08.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Clark MR, Galati SA. Opioids and psychological issues: A practical, patient-centered approach to a risk evaluation and mitigation strategy. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.eujps.2010.09.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Heijmans M, Olde Hartman TC, van Weel-Baumgarten E, Dowrick C, Lucassen PLBJ, van Weel C. Experts' opinions on the management of medically unexplained symptoms in primary care. A qualitative analysis of narrative reviews and scientific editorials. Fam Pract 2011; 28:444-55. [PMID: 21368064 DOI: 10.1093/fampra/cmr004] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND The feasibility as well as the suitability of several therapies for medically unexplained symptoms (MUS) in primary care applied by the family physician (FP) appeared to be low. FPs need effective and acceptable strategies to manage these functionally impaired patients. OBJECTIVE To review important and effective elements in the treatment of patients with MUS in primary care according to experts in MUS research. METHODS We performed a systematic search of narrative reviews and scientific editorials in Medline and PsycINFO and triangulated our findings by conducting a focus group with MUS experts. RESULTS We included 7 scientific editorials and 23 narrative reviews. According to MUS experts, the most important elements in the treatment of MUS are creating a safe therapeutic environment, generic interventions (such as motivational interviewing, giving tangible explanations, reassurance and regularly scheduled appointments) and specific interventions (such as cognitive approaches and pharmacotherapy). Furthermore, MUS experts indicate that a multi-component approach in which these three important elements are combined are most helpful for patients with MUS. In contrast to most specific interventions, opinions of MUS experts regarding generic interventions and creating a safe therapeutic relationship seem to be more based on theory and experience than on quantitative research. CONCLUSIONS MUS experts highlight the importance of generic interventions and doctor-patient communication and relationship. However, studies showing the effectiveness of these elements in the management of MUS in primary care is still scarce. Research as well as medical practice should focus more on these non-specific aspects of the medical consultation.
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Affiliation(s)
- Mieke Heijmans
- Department of Primary and Community Care, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
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Sharpe M, Walker J, Williams C, Stone J, Cavanagh J, Murray G, Butcher I, Duncan R, Smith S, Carson A. Guided self-help for functional (psychogenic) symptoms: a randomized controlled efficacy trial. Neurology 2011; 77:564-72. [PMID: 21795652 DOI: 10.1212/wnl.0b013e318228c0c7] [Citation(s) in RCA: 134] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
OBJECTIVES Functional (psychogenic or somatoform) symptoms are common in neurology clinics. Cognitive-behavioral therapy (CBT) can be an effective treatment, but there are major obstacles to its provision in practice. We tested the hypothesis that adding CBT-based guided self-help (GSH) to the usual care (UC) received by patients improves outcomes. METHODS We conducted a randomized trial in 2 neurology services in the United Kingdom. Outpatients with functional symptoms (rated by the neurologist as "not at all" or only "somewhat" explained by organic disease) were randomly allocated to UC or UC plus GSH. GSH comprised a self-help manual and 4 half-hour guidance sessions. The primary outcome was self-rated health on a 5-point clinical global improvement scale (CGI) at 3 months. Secondary outcomes were measured at 3 and 6 months. RESULTS In this trial, 127 participants were enrolled, and primary outcome data were collected for 125. Participants allocated to GSH reported greater improvement on the primary outcome (adjusted common odds ratio on the CGI 2.36 [95% confidence interval 1.17-4.74; p = 0.016]). The absolute difference in proportion "better" or "much better" was 13% (number needed to treat was 8). At 6 months the treatment effect was no longer statistically significant on the CGI but was apparent in symptom improvement and in physical functioning. CONCLUSIONS CBT-based GSH is feasible to implement and efficacious. Further evaluation is indicated. CLASSIFICATION OF EVIDENCE This study provides Class III evidence that CBT-based GSH therapy improves self-reported general health, as measured by the CGI, in patients with functional neurologic symptoms.
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Affiliation(s)
- M Sharpe
- University of Edinburgh, Edinburgh, Scotland, UK.
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Wieske L, Richard E, Wijers D, Stam J, Smets EMA, Vergouwen MDI. Long-term satisfaction after neurological second opinions and tertiary referrals. Eur J Neurol 2011; 18:1310-6. [DOI: 10.1111/j.1468-1331.2011.03394.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Groben S, Hausteiner C. Somatoform disorders and causal attributions in patients with suspected allergies: Do somatic causal attributions matter? J Psychosom Res 2011; 70:229-38. [PMID: 21334493 DOI: 10.1016/j.jpsychores.2010.09.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/20/2010] [Revised: 08/03/2010] [Accepted: 09/20/2010] [Indexed: 02/01/2023]
Abstract
OBJECTIVE Somatic causal illness attributions are being considered as potential positive criteria for somatoform disorders (SFDs) in DSM-V. The aim of this study was to investigate whether patients diagnosed with SFDs tend towards a predominantly somatic attribution style. METHODS We compared the causal illness attributions of 48 SFD and 149 non-somatoform disorder patients, in a sample of patients presenting for an allergy diagnostic work-up, and those of 47 controls hospitalised for allergen-specific venom immunotherapy. The SFD diagnosis was established by means of the Structured Clinical Interview for DSM-IV. Both spontaneous and prompted causal illness attributions were recorded through interview and by means of the causal dimension of the Revised Illness Perception Questionnaire (IPQ-R), respectively. Patients' spontaneous and prompted responses were assigned to a psychosocial, somatic, or mixed attribution style. RESULTS Both in the free-response task and in their responses to the IPQ-R, SFD patients were no more likely than their nonsomatoform counterparts to focus on somatic explanations for their symptoms. They were just as likely to make psychosocial or mixed causal attributions. However, patients with SFDs were significantly more likely to find fault with medical care in the past. CONCLUSION Our data do not support the use of somatic causal illness attributions as positive criteria for SFDs. They confirm the dynamic and multidimensional nature of causal illness attributions. Clinical implications of these findings are discussed.
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Affiliation(s)
- Sylvie Groben
- Department of Psychosomatic Medicine and Psychotherapy, Technische Universitaet Muenchen (TUM), Munich, Germany
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Abstract
Myoclonus is a hyperkinetic movement disorder characterised by quick and involuntary jerks. Therapy should focus on cure of an underlying disorder; however, symptomatic treatment is often needed when treatment of an underlying cause is impossible or ineffective. The appropriate treatment for a specific type of myoclonus is based on the classification of the anatomical origin of the myoclonus: cortical, subcortical, spinal, or peripheral. We outline criteria for classification and present an overview of the available therapeutic options for the different types of myoclonus. Because of a generally low level of evidence, therapeutic options mainly rely on small observational studies and expert opinion. For an evidence-based approach in the future, randomised controlled trials of symptomatic therapies for myoclonus in homogeneous patient groups are needed.
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Affiliation(s)
- Hani Marcus
- Department of Neurosurgery, Addenbrooke's Hospital , Cambridge , UK
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Kanaan R, Armstrong D, Wessely S. Limits to truth-telling: neurologists' communication in conversion disorder. Patient Educ Couns 2009; 77:296-301. [PMID: 19560894 PMCID: PMC2773836 DOI: 10.1016/j.pec.2009.05.021] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2009] [Revised: 05/13/2009] [Accepted: 05/26/2009] [Indexed: 05/27/2023]
Abstract
OBJECTIVE Neurologists face a dilemma when communicating with their conversion disorder patients - whether to be frank, and risk losing the patient's trust, or to disclose less, in the hope of building a therapeutic relationship. This study reports how neurologists in the UK described dealing with this dilemma in their practice. METHODS Practicing consultant neurologists from an NHS region were recruited by snowball sampling. Twenty-two of 35 consultants in the region were interviewed in depth, and the interviews qualitatively analysed. RESULTS The neurologists were reluctant to disclose conversion disorder as a differential diagnosis until they were certain. They were guided by the receptivity of their patients as to how psychological to make their eventual explanations, but they did not discuss their suspicions about feigning. They described their communications as much easier now than they had seen in training. CONCLUSION Neurologists adapt their disclosure to their patients, which facilitates communication, but imposes some limits on truth-telling. In particular, it may sometimes result in a changed diagnosis. PRACTICE IMPLICATIONS An optimum strategy for communicating diagnoses will need to balance ethical considerations with demonstrated therapeutic benefit.
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Affiliation(s)
- Richard Kanaan
- King's College London, Department of Psychological Medicine, Institute of Psychiatry, London, UK.
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50
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Abstract
Chronic pain requires comprehensive care. While interdisciplinary approaches are recommended, the role of psychiatrists is often misunderstood. Psychiatrists should be involved with the care of patients with chronic pain as early as possible to maximize outcome. Psychiatrists offer an expertise that specifically addresses important deficiencies in the care of patients with chronic pain: 1) the lack of a detailed formulation, 2) the lumping of all psychopathology, and 3) the failure to effectively use psychopharmacologic treatments. This review provides a framework for formulating the diagnoses and treatments of patients with chronic pain.
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Affiliation(s)
- Michael R Clark
- Department of Psychiatry and Behavioral Sciences, The Johns Hopkins Medical Institutions, Osler 320, 600 North Wolfe Street, Baltimore, MD 21287-5371, USA.
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