 This, in turn, gave rise to the question of whether phase precession could be observed in any other regions of the brain, with other kinds of cell circuits, or whether phase precession was a peculiar property of hippocampal tissue.The finding that theta wave phase precession is also a property of grid cells in the entorhinal cortex demonstrated that the phenomenon exists in other parts of the brain that also mediate information about movement.Theta wave phase precession in the hippocampus also plays a role in some brain functions that are unrelated to spatial location.