Chiari Malformation (Kee-AR-ee): Chiari is a congenital anomaly in which two parts of the brain, the brainstem and the cerebellum, protrude through the opening at the base of the skull
What is Chiari Malformation?
The Chiari malformation is an abnormality in the lower part of the brain called the cerebellum. There are several different forms. The most common type is the Chiari I malformation (CM) which this article addresses. Less commonly, it may be known as Arnold-Chiari malformation, tonsillar herniation or tonsillar ectopia. Most cases of Chiari are congenital, meaning they are present from birth.

In normal anatomy, the cerebellar tonsils are located just above this line called the foramen magnum. But in an individual with Chiari, the tonsils hang below the line (herniate) into the spinal canal. The degree to which the tonsils extend can vary tremendously.

 

 

 
What are the symptoms?
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Severe head & Neck Pain

 • Hearing Loss
• Headaches brought on by coughing, sneezing or straining • Nystagmus (involuntary eye movements)
• Dizziness & Vertigo • Balance Problems
• Muscle Weakness • Loss of fine motor skills
• Poor hand coordination • Blurred or double vision
• Hypersensitivity to lights • Vocal cord paralysis
• Difficulty tracking objects • Difficulty Swallowing
• Tinnitus (buzzing or ringing in the ear) • Frequent gagging & choking
• Sleep Apnea    
Information courtesy of American Syringomeylia Alliance Project, Inc. (ASAP, Inc.)