🚀 go-pugleaf

"codyfrew" <codyfrew@gmail.com> wrote in message 
news:1173394093.077757.249240@v33g2000cwv.googlegroups.com...
| On Mar 8, 4:58 am, "CB" <caldwell.brob...@gmail.com> wrote:
| > "codyfrew" <codyf...@gmail.com> wrote in message
| >
| > news:1173350180.299352.23830@t69g2000cwt.googlegroups.com...
| >
| > >   Headaches are not in your brain. You are feeling pressure from
| > > sensory cells around your arteries along the outer lining of your
| > > brain.You have veins and arteries all around your brain, and even
| > > within the crevices and folds that you cannot see form the outside.
| > > BUT, they never actually break the barrier.
| >
| > How sensitive are these nerve cells? IIRC (not my field at all), brain
| > activity is linked to heightened blood flow to an area; so if (big if) 
the
| > nerves were sufficiently sensitive then they should be able to indicate
| > which areas are receiving more (or less) blood, which then gets 
interpreted
| > as feeling an area to be more or less active?
| > Just curious,
| > CB
|
| Yes, blood flow IS indeed linked to brain activity. But you cannot
| sense bloodflow. You have some sensory receptors that can deduce
| pressure, this signifiying pain for a headache, but to be honest there
| is still little known about headaches and the nerve cells that are
| responsible (let alone how sensitive they are). And even still, there
| are a lot of brain mass that doesn't directly interface with blood
| vessels.

'yeah' -- that's 'why' nerve cells 'do not
need oxygen' :-]

k. p. collins