Featured on House and Grey’s Anatomy, the disorder is called superior canal dehiscence syndrome. It is a very rare condition that affects the ear, allowing it to hear sounds inside the body.
Little is known about it, but it’s thought that .5% of people have it on some level. Typically, it affects people around 40 years old. The problem is with the superior canal part of the ear.
Overlying the superior canal is the temporal bone. In this disorder, that bone is thinner than it is meant to be (normally due to improper development). Typical symptoms include hearing your own speech or other noises in the body (like eye movements) very loudly, balance problems (because of the inner ear’s role in keeping balance), and rapid eye movement.
If this makes you feel paranoid that you have it, a normal CT scan can determine it, though it’s highly unlikely that you do. The disorder can be treated by surgery relatively easily. Whether you only think you have it or you genuinely do, you can rest assured knowing either way it’s all in your head.