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    Opisthotonos

    Opisthotonos is a condition in which the body is held in an abnormal position. The person is usually rigid and arches the back, with the head thrown backward. If a person with opisthotonos lies on his or her back, only the back of the head and the heels touch the supporting surface.

    See: Abnormal posturing

    Considerations

    Opisthotonos is much more common in infants and children than in adults. It is also more exaggerated in infants and children because of their less mature nervous systems.

    Causes

    Opisthotonos may occur in infants with meningitis. It may also occur as a sign of reduced brain function or injury to the nervous system.

    Other causes may include:

    • Arnold-Chiari syndrome (a problem with the structure of the brain)
    • Brain tumor
    • Gaucher disease
    • Growth hormone deficiency (occasionally)
    • Glutaric aciduria and organic acidemias (forms of chemical poisoning)
    • Krabbe Disease
    • Seizures
    • Severe electrolyte imbalance
    • Severe head injury
    • Stiff-person syndrome (a condition that makes a person rigid and have spasms)
    • Subarachnoid hemorrhage (bleeding in the brain)
    • Tetanus

    Drugs such as phenothiazines and other antipsychotic medications, can cause a side effect called acute dystonic reaction. Opisthotonos may be part of this reaction.

    In rare cases, infants born to women who drink large amounts of alcohol during pregnancy may have opisthotonus due to alcohol withdrawal.

    Home Care

    A person who develops opisthotonos will need to be cared for in a hospital.

    When to Contact a Medical Professional

    Go to the emergency room or call your local emergency number (such as 911) if this symptom occurs. Typically opisthotonos is a symptom of other conditions that are serious enough for a person to seek medical attention.

    What to Expect at Your Office Visit

    This condition will be evaluated in a hospital, and emergency measures may be taken.

    The health care provider will take a medical history and perform a physical examination to look for the cause of opisthotonos

    Medical history questions may include:

    • When did this behavior start?
    • Is it always the same type of posturing?
    • What other symptoms came before or with the abnormal posturing (such as fever, stiff neck, or headache)?
    • Is there any recent history of illness?

    The physical examination will include a complete check of the nervous system.

    Tests may include:

    • Blood and urine tests
    • Cerebrospinal fluid (CSF) culture and cell counts
    • CT scan of the head
    • Electrolyte analysis
    • Lumbar puncture (spinal tap)
    • MRI of the brain

    References

    Chiriboga CA. HIV, fetal alcohol and drug effects, and the battered child. In: Rowland LP, Merritt HH, eds. Merritt's Neurology. 12th ed. Baltimore, Md: Lippincott Williams & Wilkins; 2009.

    Patterson MC, Johnson WG. Lysosomal and other storage diseases. In: Rowland LP, Merritt HH, eds. Merritt's Neurology. 12th ed. Baltimore, Md: Lippincott Williams & Wilkins; 2009.

    Layzer RB, Rowland LP. Muscle cramps and stiffness. Merritt's Neurology. 12th ed. Baltimore, Md: Lippincott Williams & Wilkins; 2009:chap 145.

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          Review Date: 4/5/2013

          Reviewed By: Jacob L. Heller, MD, MHA, Emergency Medicine, Virginia Mason Medical Center, Seattle, Washington. Also reviewed by A.D.A.M. Health Solutions, Ebix, Inc., Editorial Team: David Zieve, MD, MHA, Bethanne Black, Stephanie Slon, and Nissi Wang.

          The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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