Brain sends commands to the articulators

[Yuri Tambovtsev]

Yuri,

It's not that the brain commands us to use glottal stops or not. There is 
a historical process whereby languages change their phonetic inventories. 
It has nothing to do with the genetic configuration of different brains.

    --Aya

My dear Aya, if you read books on phonetics, you'll learn that Brain sends commands to the articulators to produce this or that sound. What you wrote is quite strange for specialists in phonetics. Be well Yuri