It depends on your age, the area of your brain and the function being performed.
And not surprisingly (well, maybe to some of you :lol: ), a younger brain is a 'faster' brain.
The firing synapses (moving along their fiber networks) are actually a chemical reaction. And when you are young those 'neurotransmitters' are really firing.
HOWEVER, the issue is in the development and maturation of the prefrontal cortex (the area of your brain where higher
cognitive abilities are performed). Therefore, it is very difficult to define a correlation between the ""speed"" of the brain and IQ.
'Higher cognitive abilities' are more related to the ability of the prefrontal cortex to filter and suppress irrelevant
information. Younger brains (up to 20 years or so) don't do that worth a damn - regardless of speed. I would surmise the same applies in this comparison.
So. The brain of a person with an IQ of 100
might be really fast BUT their brain cannot filter and suppress irrelevant information as efficiently as the person with an IQ of 140. The 'Brainiac' simply processes relevant data instead of garbage.
Thank you, Betty Jo !
(I used to boink a brain scientist long ago. Being the arse-wipe that I am what knowledge I obtained was most likely through some cosmic genital osmosis
)