Foix-Chavany-Marie syndrome

Foix-Chavany-Marie syndrome (FCMS), also known as bilateral anterior opercular syndrome or opercular syndrome, is a rare neurological condition characterized by the loss of voluntary control of the muscles of the face, tongue, pharynx, and jaw (facio-pharyngo-glosso-masticatory diplegia), while automatic and reflexive movements of these same muscles are preserved. This dissociation between voluntary and involuntary motor control is the hallmark of the syndrome. It results from bilateral damage to the anterior opercular region of the brain (the area surrounding the Sylvian fissure in the frontal and parietal lobes), which can be caused by strokes (most commonly), infections, epilepsy, or developmental malformations. Key symptoms include an inability to voluntarily move the face, tongue, and pharyngeal muscles, leading to severe difficulties with speech (anarthria), swallowing (dysphagia), and chewing. Patients may drool and have difficulty protruding the tongue or closing the mouth on command. However, these same patients can often smile spontaneously, yawn, cry, or cough normally because these automatic movements are controlled by different neural pathways. In some cases, particularly in children, the syndrome may be associated with epilepsy (Worster-Drought syndrome or congenital form). The condition can present in both acquired (adult) and developmental (childhood) forms. There is no specific curative treatment for Foix-Chavany-Marie syndrome. Management is supportive and multidisciplinary, focusing on speech therapy, swallowing rehabilitation, nutritional support (which may include nasogastric or gastrostomy feeding in severe cases), and treatment of the underlying cause when possible. In cases associated with epilepsy, antiepileptic medications may be beneficial. Prognosis varies depending on the underlying etiology; some patients may show partial recovery, particularly when the cause is vascular, while developmental forms tend to have a more persistent course.

Common questions about Foix-Chavany-Marie syndrome