Figure 6.

Multielectrode recordings from a Euglandina procerebrum show that neuronal spiking is activated by mucus stimulation of lip extension. Sample traces showing spike activity recorded simultaneously from five electrodes from a Euglandina ganglia. Notice the increase in the baseline noise over the time of the baseline recording from electrode #14. Bottom Panel: Image of Euglandina snail ganglia on electrode array with displayed electrodes identified with arrows. Colors correspond to the particular electrode trace shown.