Locked-in syndrome is probably one of the most horrifying medical conditions you can suffer from. Terrible.
Locked-in Syndrome (LiS): What It Is, Causes & Symptoms
Locked-in syndrome (LiS) is a rare neurological disorder characterized by complete paralysis of voluntary muscles, except for those that control your eyes.
Locked-in syndrome - Wikipedia
Summary
Locked-in syndrome is a rare neurological disorder in which there is complete paralysis of all voluntary muscles except for the ones that control the movements of the eyes. Individuals with locked-in syndrome are conscious and awake, but have no ability to produce movements (outside of eye movement) or to speak (aphonia). Cognitive function is usually unaffected. Communication is possible through eye movements or blinking. Locked-in syndrome is caused by damaged to the pons, a part of the brainstem that contains nerve fibers that relay information to other areas of the brain.

