Do We Use 10 Percent Of Our Brain?

I would suppose this is an error in reasoning in the neuro-scientific enterprise. I would say explicitly that one does not use such a tiny 10% of his/her brain to leave the 90% idle. The brain is like other mechanisms whose corporate whole would be meaningful if they can function together.

Brain myth

Consider a truck which would carry a load of foodstuff, it has only a tire to work to its destination but lacks the most essential and appropriate other parts such as its engine, flashlights, cooling fan etc… will it function properly?

 Limiting the function of the brain to 10 percent alone would limit some other chemical and essential processes such as the amount of neurotransmitter needed for the appropriate neural firing/action potential as much as how fast its processing speed would be. 

This speed is to some reasonable extent, dependent on myelination
 which if you only use such a tiny percent of your brain, the brain might be too slow to conduct nerve impulses since it will contradict the Donald Hebb’s principle of neuroplasticity that ‘the neurons that fire together, wire together and the neurons that fire apart, wire apart.’