Fear of Public Speaking. The human brain is an amazing piece of kit, it's our Central Processing Unit. It is constantly active, it starts working the minute we are born and it never stops until you have to stand up to speak in public. Glossophobia, a.k.a. the fear of public speaking is a specific type of anxiety disorder. It originates from the attention given to us when speaking publicly and our fear of being judged by them. We then focus on our mistakes which makes us make even more mistakes.