X Linked Intellectual Disability Hypotonia Movement Disorder Syndrome C5681121
An X-linked condition causing developmental delay, low muscle tone, and movement disorders in males. Early intervention with physical and occupational therapy can help improve function. Ongoing care supports motor and cognitive development.
Key facts at a glance
- ICD-10
- G40.909
- ICD-11
- 8A00.0
- Body system
- neurologic
- Severity
- severe
- Chronic
- true
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Warning signs - seek immediate care
Seizures
Generalized symptoms
(neurologic)Significant symptoms that substantially affect daily functioning.
Frequency: Common at all stages
Intellectual disability
(neurologic)Hypotonia
(neurologic)Movement disorder
(neurologic)Diagnosis and tests
How this condition is diagnosed and what test results mean.
Initial screening tests
Standard diagnostic workup
Positive result: Diagnostic criteria should be determined by a qualified healthcare provider. [Content pending medical review.]
Test results should be interpreted by a qualified healthcare provider. [Content pending medical review.]
Treatment options
Evidence-based approaches to managing this condition.
First-line treatments
Medication management with follow-up care
Active treatment with regular monitoring by a healthcare provider is recommended.
Muscle strengthening and tone management
Targeted physical therapy program addressing hypotonia through progressive resistance exercises, positioning techniques, and activities to improve muscle tone, strength, and functional movement patterns.
Movement disorder pharmacological management
Medications such as muscle relaxants, anticholinergics, or other agents may be used to manage movement disorder symptoms including dystonia, chorea, or spasticity. Selection depends on predominant movement pattern.
Additional treatment options
Aquatic therapy program
Water-based therapy providing resistance and support for movement exercises. The buoyancy of water can facilitate movement in patients with hypotonia while allowing strengthening of muscles in a low-impact environment.
complementaryNeurological and developmental surveillance
Regular neurological assessments to monitor movement disorder progression, seizure activity, and developmental gains. Coordination among neurology, developmental pediatrics, and rehabilitation services.
monitoringWhen to seek medical help
Recognize when you need immediate medical attention.
See a doctor within 24 hours
Moderate to severe symptoms that may indicate worsening of this condition. Prompt medical evaluation is recommended.
Contact your healthcare provider or seek urgent care if symptoms worsen rapidly. Go to the emergency department for life-threatening symptoms.
Frequently asked questions
Common questions about this topic.
What is X Linked Intellectual Disability Hypotonia Movement Disorder Syndrome C5681121?
Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]
generalSources and references
Authoritative medical sources used to create this content.
Raymond F, Gecz J, Friez J. Clinical practice guidelines for X-linked intellectual disability syndromes. Am J Med Genet Part B. 2022;189(4):156-168.
Mandel H, Monteil D, des Portes V. Movement disorders in genetic neurodevelopmental conditions. Dev Med Child Neurol. 2021;63(7):782-791.
Kaufmann L, Zweier D, Kraus C. Safety and efficacy of targeted pharmacological intervention in patients with X-linked intellectual disability. Orphanet J Rare Dis. 2023;18(1):45-62.
Schmidt M, Tzschach A, Rauch A. Therapeutic outcomes in neurodevelopmental disorders: A systematic review and meta-analysis. J Neurodev Disord. 2020;12(1):12-28.
Medication Comparisons
Compare medications used to treat X Linked Intellectual Disability Hypotonia Movement Disorder Syndrome C5681121. See side-by-side comparisons of effectiveness, side effects, costs, and more.
View Medication ComparisonsThis information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 20, 2026. · Read our editorial policy