For the protocol, see
OBEX.
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.
[edit] Clinical significance
Hemangioblastoma has been observed in this location.[1] Neurological surgical intervention in the treatment of syringomyelia or hydromyelia may involve plugging the obex to prevent the transmission of cerebrospinal fluid to the central canal of the spinal cord.
[edit] References
[edit] External links
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Grey: Raphe/
reticular |
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