Functional Dystonia (Disorder) Clinical Trial
Description of the Evolution of Functional Dysphonia Managed by Hypnotherapy
HYPNODYS is a single-center study evaluating the evolution of perceived voice-related disability before and after 3 standardized hypnosis sessions in patients with functional dysphonia.
Functional or psychogenic voice and speech disorders are characterized by various changes in voice (aphonia or dysphonia) or speech (stuttering, foreign accent syndrome, and childish prosody in adults) without organic damage associated. These disorders have a significant functional impact (physical and mental handicap) and a significant cost for society. Their management, like that of functional neurological disorders in general, is still poorly codified. Different therapeutic strategies are mentioned, especially in the event of speech therapy failure, in particular behavioural and cognitive psychotherapeutic approaches. The recent explanatory hypotheses of functional neurological disorders are that the processing of sensory and motor information can be modulated, or even inhibited, by cognitive and attentional mechanisms. Different elements (volition, emotions, attention) can exclude certain psychic representations from consciousness. Hypnosis, by exercising direct control over attentional resources makes it possible to obtain hypoactivation of the medial prefrontal cortex and hyperactivation of the executive and salience networks, making greater use of the buffer of working memory and activate the para-sympathetic system. Thus, one can observe analgesia, amnesia, a loss of the notion of time, plurimodal hallucinations, a detachment from oneself, a distortion of reality and logic. Hypnosis has been used since the 19th century in the treatment of functional paralysis. To date, there are only presentations and case series evaluating the value of hypnosis in functional disorders of voice and speech. However, from a clinical standpoint, the use of hypnosis seems to show a significant interest in functional speech disorders. Functional neurological disorders are located at the crossroads of neurological and psychiatric disorders, psychiatric and psychological evaluation of these patients therefore seems necessary in order to measure their impact on the pathological and recovery processes through hypnotherapy. ;