SP4 and schizophrenia: In contrast to the abundance of evidence on schizophrenia-related increased resting (i.e. in a task-free context) theta power reported in the human literature, whether the specific phenotypes of resting-state cortical phase-coupling of theta waves we observed in Sp4 hypomorphic mice actually corresponded to disease-specific signatures (especially the slower theta phase progression along the neuraxis) lacked previous matching studies in humans, and thusly remains an open question for future studies to explore.