Glucocorticoids (GCs) have multi-level, sometimes conflicting effects in the brain.
GCs achieve complex neurodynamics, guided by their circadian and ultradian rhythmicity.
Ultradian rhythmicity leads to a spatial and temporal mosaic of GC-dependent actions in the brain.
The temporal relationship between GC pulses and other (physiological, pathological) stimuli lead to different effects.
GC rhythmicity needs to be taken into consideration for effective GC-based therapeutic strategies.