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> How long does it take for the brain to recognize pain?, B) What speed does the brain recognize pain from nerve signals?
deathonimpact
post Mar 30, 2015, 03:21 AM
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For instance, on fatal impact. Would you feel the impact before losing consciousness?

I know A-delta fibre myelin sheathed nerves will transmit over 100 metres a second (0.61ms). The questions therefor are:

A ) How fast does unconsciousness occur?

B ) What speed does the brain recognize pain from nerve signals?
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james_taylor537
post Apr 05, 2015, 08:21 AM
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QUOTE(deathonimpact @ Mar 30, 2015, 04:21 AM) *

For instance, on fatal impact. Would you feel the impact before losing consciousness?

I know A-delta fibre myelin sheathed nerves will transmit over 100 metres a second (0.61ms). The questions therefor are:

A ) How fast does unconsciousness occur?

B ) What speed does the brain recognize pain from nerve signals?


"some painful stimuli one can distinguish first a fast pain
felt within about 0.1 second after the pain stimulus and having a sharp pricking sensation.
This fast pain is then followed after a lull of about one second or more by a second slow
pain having a dull burning feeling. The first fast pain is thought to be mediated by A(δ-β)
fibers sensitive to mechanical and thermal stimuli. The second slow dull pain is thought
to be transmitted centrally by C-fibers. On entering the spinal cord the fast pain pathway
and the slow pain pathway take two routes to the brain via the neospinothalamic tract and
the paleospinothalamic tract respectively."
NOCICEPTORS AND THE PERCEPTION OF PAIN Alan Fein, Ph.D. February 2012
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