Obex

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The obex (from the Latin for barrier) is the point in the human brain at which the fourth ventricle narrows to become the central canal of the spinal cord.

The obex occurs in the caudal medulla.

The decussating of sensory fibers happens at this point.

External links

• Photo at aphis.usda.gov

Obex is also a verb meaning "to throw in the way of" or "to hinder."

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Last updated on Thursday December 20, 2007 at 10:29:06 PST (GMT -0800)
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