SIGNAL ALGORITHM. “Researchers asked 12 people with epilepsy to look at pictures and then recall up to 90 seconds later which ones they had seen. While the participants did this, the researchers recorded the firing patterns in both CA3 and CA1. They then developed an algorithm that could use the activity of the CA1 cells to predict the pattern that was coming from CA3. Compared with the actual patterns, their predictions were accurate about 80% of the time.”
http://www.nature.com/news/memory-boosting-devices-tested-in-humans-1.18712