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In vitro multi-electrode intracellular array, recording signals from the brain of a Common Pond Snail (Lymnaea stagnalis), which has been 'trained' using Pavlovian techniques to produce a conditioned feeding response to stimuli to which it was previously neutral. The brain of the snail retains a significant memory of its training, and the recording of the electrical signals & molecular pathways involved is shedding light on the formation of long-term memory, with implications for understanding Alzheimers.