Neonatal cortical activity organizes into transient network states that are affected by vigilance states and brain injury

•Neonatal cortical activity organizes into transient network states.•These states have specific spectral and connectivity patterns.•Vigilance states and brain injury affect the dynamics of these transient network states.•Quiet sleep has more brain-wide neural synchronization compared to active sleep.•Brain injury is associated with lowered dynamics in the cortical networks.