Chiari Connection International

Chiari Connection International

Basilar Invagination (BI)
Basilar Invagination (BI)


Basilar invagination occurs when the top of the second vertebrae moves upward. It can cause the opening in the skull where the spinal cord passes through to the brain (the foramen magnum) to close. It also may press on the lower brainstem. The brainstem is a stalk-like part of the brain that connects the main portion of the brain to the spinal cord.


Periods of confusion or conscious awareness that doesn't seem normal
Difficulty swallowing or saying words due to loss of muscle control after damage to the nervous system (dysarthria)


Loss of sensation

Pain in the back of the head

Loss of the ability to know how joints are positioned

Tingling or numbness in the fourth and fifth fingers

Tingling or numbness in the middle part of the forearm

Tingling when the neck bends forward or backward

Weakness or stiff,awkward movements of the of the arms and legs


If there aren't neurological symptoms (such as difficulties moving, loss of sensation, confusion, etc.) and there is no evidence of pressure on the spinal cord, a conservative approach may be taken such as:

Drugs, such as aspirin, without steroids to relieve inflammation (tenderness and swelling), and Neck traction, in which the neck is pulled along its length, thus relieving pressure on the spinal cord

Using a neck collar

If there is pressure on the spinal cord, surgery is recommended.

Previous Page
Site Provided By: CCI Staff Webmaster | © 2010-2015 Chiari Connection International. All rights reserved.

Chiari Connection International