  SCP-0000 instances primarily attach to neurons in the limbic system and encase them in a previously unseen variant of ordinary myelin. This myelin includes an average 0% increased amount of sphingomyelin protein and traces (<0.00%) of a complex protein labeled 0000-U00.  Approximately 0.00000% of the human population are immune or resistant to SCP-0000 infestation. Due to SCP-0000's tendency to irreversibly integrate itself into neural systems, immunity to the parasite severely inhibits the rate of formation of myelin sheaths in the neurons of the brain, leading to complications. In particular, SCP-0000 appears to be heavily associated with the mechanisms responsible for the perception of fear in the human brain.  SCP-0000 instances are capable of absorbing and emitting signals seemingly at random. Preliminary studies suggest that SCP-0000 is responsible for 