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What is a restrictive ventilatory defect in multiple sclerosis (MS)?

Multiple sclerosis (MS) can result in something called a restrictive ventilatory defect. This is caused by weakness or spasticity in the muscles between the ribs or intercostal muscles. People with a restrictive ventilatory defect may feel short of breath or like they cannot take a deep breath. Fortunately, this respiratory symptom in MS does not usually affect actual blood oxygenation significantly. The best way to diagnose this issue is with pulmonary function studies.

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What Is Multiple Sclerosis?
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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.