Infection and Locked-In Syndrome
Instances of locked-in syndrome caused by infection are relatively rare, according to research findings. Only a small number of cases have been reported, with one attributed to a pseudomonas abscess and two resulting from meningitis. In the cases of meningitis, one was caused by the spread of a brainstem abscess, while the other occurred due to increased intracranial pressure exerting force on the brain stem.
Demyelination: A Cause of Locked-In Syndrome
In the human body, numerous nerve fibers are enveloped by protective myelin sheaths, which play a vital role in speeding up the transmission of nerve impulses. However, certain medical conditions can harm these myelin sheaths in the nerves of the central nervous system, resulting in a debilitating condition known as locked-in syndrome. One such condition is metabolic demyelination, which can occur when there is a sudden and significant increase in sodium levels. Although relatively uncommon, locked-in syndrome can also be caused by demyelinating diseases like multiple sclerosis, Guillain-Barre syndrome, and amyotrophic lateral sclerosis (ALS).