Why is the epidural space absent in the brain?
Since this is not my area of expertise, I searched Google under the key words "brain 'epidural space'" to get these possible sources:
http://depts.washington.edu/anesth/regional/epiduralspacetext.html
http://en.wikipedia.org/wiki/Epidural_hematoma
http://cancerweb.ncl.ac.uk/cgi-bin/omd?cranial+epidural+space
http://www.myelectronicmd.com/get_reference.php?Id=951
http://www.burtonreport.com/InfSpine/EpiduralSteroidAnatomy.htm
In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search.
I hope this helps. hyanksfor asking.
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The epidural space is absent in the brain because the brain is surrounded by the skull, which provides a protective barrier. The epidural space is a potential space that exists between the dura mater (the outermost layer of the brain's protective covering) and the skull in the spinal column. It is where epidural anesthesia is typically administered.
In the brain, there is no similar space between the dura mater and the skull. Instead, the brain is enclosed within the cranial cavity, which is formed by the cranium. The cranium is a thick, bony structure that encases and protects the brain, providing a solid barrier.
Therefore, the absence of an epidural space in the brain is due to the anatomical differences between the spinal column and the cranial cavity.