 SCP-601 is a group of 12 adult humans, of varying age. The constituent members of SCP-601 perform all actions and bodily functions in unison, in as much as is physically and anatomically possible, with no more than 0.15 seconds of delay between any two members of the collective. The source of this synchronization is unclear. No means of relaying nervous system responses between the 12 components of SCP-601 has been observed. Moreover, fMRI and EEG readings of SCP-601-1 through SCP-601-12 suggest zero brain function, despite continued and synchronous operation of all other organ systems.