This Evidence Map includes research related to the screening, assessment, and treatment of speech, language, swallowing, voice, cognitive-communication, cough-related, hearing, and vestibular symptoms associated with functional neurological disorders (FNDs). FNDs are neurological conditions characterized by deficits that cannot be explained by structural damage to the nervous system or by another medical or psychiatric disorder. However, diagnosis is based on positive clinical features rather than the absence of other explanations. These features include internal inconsistency, suggestibility, distractibility, inefficient and non-ergonomic movement patterns, deficits in voluntary motor functioning, and findings incompatible with physical examination results. Historically, these disorders have been referred to by various terms — including conversion, psychogenic, non-organic, and somatoform disorders — though current diagnostic frameworks now favor the term functional neurological disorder.