Precompetitive Cognitive state anxiety is an anxiety that is associated with the mind.
It happens to an athlete or any individual due to fear. This anxiety can be curbed by trying as much as possible to develop a relaxed mindset towards any event causing it.
An athlete going to be involved in a race mostly have this anxiety, it can either push him to success or drag him to failure.
Your brain has nerves and those nerves run throughout your system so in that case your central nervous system control everything. It is like a director it tells your heart to pump blood it signals everything it even control your homeostasis and reflex.