Posted by Dennis O'C (126.96.36.199) on February 07, 2002 at 22:54:08:
In Reply to: Clusters are Unmistakeable posted by Jack on February 07, 2002 at 18:09:51:
...what exactly causes a CH to hurt?
I saved this from a serious Drummer post dated 08:12:38 04/15/00
Pain afferents from the trigeminovascular system transverse the ophthalmic division of the trigeminal nerve, taking signals from the cranial vessels and dura mater. These synapse in the trigeminal nucleus caudalis and then project to the thalamus (ventroposterior) and lead to activation in cortical areas, including frontal cortex, insulae, and cingulate cortex, RESULTING IN PAIN.
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