 However, decreases in firing rate over short-term training on repeated stimuli appear to be greatest in those cells that initially respond with the highest activation rate, in line with the fatigue model above.The key concept in this model is that information travels faster through the network when the current stimulus representation overlaps with a previous representation, driven by more rapid onset of neural activation with repeated presentations.fMRI studies have been used in an attempt to measure these potential latency differences but the temporal resolution is not very precise and single cell recordings typically do not show shortened latencies to repeated stimuli.