Understanding, Recognizing, and Managing Functional Speech Disorders: Current Thinking Illustrated With a Case Series
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…
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