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Functional dystonia — Clinical Guidelines

Overview

Functional dystonia refers to involuntary muscle contractions causing abnormal postures or movements, often without a clear neurological cause, impacting daily functioning and quality of life 1. It overlaps with functional neurological disorders where psychological factors play a significant role in symptom manifestation 1.

Diagnosis

Clinical Presentation: Characteristic involuntary movements or postures 1.

Exclusion of Organic Causes: Comprehensive neurological evaluation to rule out other movement disorders 1.

Psychological Assessment: Evaluation for psychological factors and expectations influencing symptoms 1.

No Specific Diagnostic Tests: Primarily clinical diagnosis based on history and examination 1.

Management

Psychological Interventions: Cognitive-behavioral therapy (CBT) and other psychological therapies to address underlying psychological factors 1.

Placebo and Nocebo Awareness: Educating patients about the placebo and nocebo effects to optimize treatment outcomes 1.

Multidisciplinary Approach: Collaboration with physiotherapists, occupational therapists, and psychiatrists 7.

Rehabilitation Focus: Setting small, achievable goals and incorporating sustained interventions into daily routines 7.

Special Populations

Elderly: Increased risk of polypharmacy and functional decline; careful medication review is essential 2.

Comorbidities: Management should consider multimorbidity and potential inappropriate medications (PIMs) impacting functional status 2.

Key Recommendations

Incorporate psychological assessments and interventions, such as CBT, to address functional dystonia 1 (Evidence: Strong).

Educate patients about the placebo and nocebo effects to enhance treatment efficacy 1 (Evidence: Moderate).

Utilize a multidisciplinary team approach including rehabilitation specialists to set realistic, incremental goals 7 (Evidence: Expert opinion).

Conduct thorough medication reviews in elderly patients to minimize PIMs and improve functional outcomes 2 (Evidence: Moderate).

References

1 Mostafaei H, Jilch S, Carlin GL, Mori K, Quhal F, Pradere B et al.. The placebo and nocebo effects in functional urology. Nature reviews. Urology 2022. link 2 Salm C, Sauer J, Binder N, Pfefferle A, Sofroniou M, Metzner G et al.. Over- and under-prescribing, and their association with functional disability in older patients at risk of further decline in Germany - a cross-sectional survey conducted as part of a randomised comparative effectiveness trial. BMC geriatrics 2022. link 3 Goos-Peek N, De Lange GD, Diraoui SB, van Maarschalkerweerd WWA, de Jonghe A. The added value of clinical geriatric assessment prior to geriatric rehabilitation. The Netherlands journal of medicine 2017. link 4 Sinden KE, McGillivary TL, Chapman E, Fischer SL. Survey of kinesiologists' functional capacity evaluation practice in Canada. Work (Reading, Mass.) 2017. link 5 Aizen E, Swartzman R, Clarfield AM. Hospitalization of nursing home residents in an acute-care geriatric department: direct versus emergency room admission. The Israel Medical Association journal : IMAJ 2001. link 6 Anstey KJ, Lord SR, Smith GA. Measuring human functional age: a review of empirical findings. Experimental aging research 1996. link 7 Ory MG, Williams TF. Rehabilitation: small goals, sustained interventions. The Annals of the American Academy of Political and Social Science 1989. link

Functional dystonia