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Hypotonia Synonym(s): Reviewed 03-26-2003 Get Web page suited for printing Email this to a friend or colleague Studies with patients Table of Contents (click to jump to sections) What is Hypotonia?Is there any treatment? What is the prognosis? What research is being done? Organizations What is Hypotonia? Hypotonia, or severely reduced muscle tone (the amount of tension or resistance to movement in a muscle), is seen primarily in children. It is not the same as muscle weakness but it can co-exist with muscle weakness. Hypotonia may be caused by trauma, environmental factors, or by genetic, muscle, or central nervous system disorders. Sometimes it may not be possible to find the cause of the hypotonia. While most children tend to flex their elbows and knees when resting, hypotonic children hang their arms and legs by their sides. They also may have substantial weakness and little or no head control, giving them a "floppy" appearance. Typical symptoms also include problems with mobility and posture, breathing and speech difficulties, lethargy, ligament and joint laxity, and poor reflexes. Hypotonia does not affect intellect. However, depending on the underlying condition, some children may take longer to develop social, language, and reasoning skills. When hypotonia starts in adults, it may be due to cerebellar degeneration. Is there any treatment? What is the prognosis? What research is being done? Muscular Dystrophy Association
National Organization for Rare Disorders (NORD)
March of Dimes Birth Defects Foundation
National Institute of Child Health and Human
Development Clearinghouse
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