Foix-Chavany-Marie syndrome

Foix-Chavany-Marie syndrome (FCMS), also called anterior opercular syndrome, is a clinical pattern caused by injury or dysfunction in opercular and connected corticobulbar networks. It is not one genetic disease. Stroke is a frequent cause, but infection, trauma, tumor, demyelination, epilepsy, and congenital or perinatal brain differences can produce a similar syndrome.1

Urgent safety

Call emergency services for sudden facial or tongue weakness, loss of speech, new swallowing difficulty, or another abrupt neurologic change. Treat sudden onset as a possible stroke even if the person has had FCMS before.

Emergency assessment is also appropriate for breathing difficulty, blue or gray color, inability to clear secretions, choking that does not resolve, reduced responsiveness, or a prolonged or repeated seizure under the person's seizure plan. New fever, cough, wet voice, or breathing change after meals needs prompt review because aspiration can be silent or subtle.

Clinical pattern and diagnosis

The characteristic finding is automatic-voluntary dissociation: voluntary movement of the face, jaw, tongue, palate, pharynx, or larynx is markedly impaired while some spontaneous emotional or reflexive movements remain. A person may be unable to move on command yet still blink, yawn, smile, laugh, cry, or cough automatically.1

Possible effects include anarthria or severe dysarthria, difficulty chewing, drooling, dysphagia, and reduced voluntary facial expression. Limb weakness, seizures, aphasia, cognitive change, or other neurologic findings depend on the cause and extent of brain involvement. Preserved automatic movement does not establish swallowing safety, and absent speech does not establish absent language or decision-making capacity.

Diagnosis is clinical and usually includes urgent brain imaging when onset is acute. MRI or CT findings and the wider evaluation should identify the underlying cause, timing, and associated injury. Brainstem disease, neuromuscular conditions, motor neuron disease, apraxia, and other causes of bulbar symptoms may need consideration. FCMS describes the neurologic syndrome; it does not replace the etiologic diagnosis.1

Treatment and follow-up

Treatment targets the underlying cause and complications. Stroke treatment, seizure care, infection treatment, surgery, or other disease-specific care follows the responsible condition. Rehabilitation is individualized around swallowing, communication, mobility, and participation. Recovery ranges from substantial improvement to persistent disability and cannot be predicted from the syndrome name alone.1

Swallowing and communication

Arrange direct swallowing assessment when there is coughing, choking, drooling, difficulty managing secretions, prolonged meals, weight or hydration change, recurrent chest illness, or concern about aspiration. Food texture, liquid consistency, posture, pacing, exercises, and non-oral nutrition depend on instrumental and clinical findings; they are not automatic FCMS prescriptions.

Motor speech may be severely limited while comprehension, literacy, and intended message remain useful. Establish a reliable yes/no response and urgent messages early. Offer writing, alphabet or word boards, gesture, partner-assisted scanning, and speech-generating AAC according to the person's current language, literacy, motor control, vision, hearing, positioning, fatigue, and goals.

Do not assign touch, switch, or eye-gaze access from the diagnosis. Trial access methods in meaningful tasks, train communication partners, provide time to respond, and keep a low-tech backup available.3 For evaluation, trials, funding, and implementation, use the AAC device acquisition guide.

Coding

FCMS has no dedicated ICD-10-CM descriptor in the current US code set. Code the documented underlying cause and relevant manifestations using current local rules and coding review. The motor-neuron-disease mapping previously shown on this page is not FCMS-specific.4

Sources

1. Weller. Anterior opercular cortex lesions and automatic-voluntary dissociation — foundational clinical review distinguishing FCMS as an opercular syndrome with multiple etiologies.
2. Arki et al. Traumatic Foix-Chavany-Marie syndrome — recent evidence for traumatic etiology, variable recovery, and cause-directed rehabilitation.
3. American Speech-Language-Hearing Association: Augmentative and Alternative Communication — individualized, multimodal AAC assessment without prerequisites.
4. Centers for Medicare & Medicaid Services: FY2026 ICD-10-CM definitions — current motor neuron disease descriptors.

Review boundary

This page cannot diagnose FCMS, determine its cause, or remotely assess stroke, airway, swallowing, seizure, or communication safety. Emergencies need immediate local assessment. Treatment, diet, rehabilitation, equipment, and communication decisions need direct review with qualified clinicians and the person.