Editing Place cell (section)

==== Movement inputs ====
[[File:Path integration diagram.svg|thumb|upright=1.25|Grid and place cells contribute to [[path integration]], a process which sums the [[Euclidean vector|vector]]s of distance and direction travelled from a start point to estimate current position.]]

Movement can also be an important spatial cue. Mice use their self-motion information to determine how far and in which direction they have travelled, a process called [[path integration]].<ref name="Moser-2008" /> This is especially the case in the absence of continuous sensory inputs. For example, in an environment with a lack of visuospatial inputs, an animal might search for the environment edge using touch, and discern location based on the distance of its movement from that edge.<ref name="okeefe1999" /> Path integration is largely aided by [[grid cell]]s, which are a type of neuron in the entorhinal cortex that relay information to place cells in the hippocampus. Grid cells establish a grid representation of a location, so that during movement place cells can fire according to their new location while orienting according to the reference grid of their external environment.<ref name="Jeffery 775–785" />